Question 1: Palette 1/122

NEET 2026 MCQ

Which one of the following is the site for active ribosomal RNA synthesis?

A

Centrosome

B

Chromatin

C

Nucleolus

D

Kinetochore

Question 2: Palette 2/122

NEET 2026 MCQ

Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are $\_\_\_\_$ .

A

Ribosomes

B

Lysosomes

C

Centrosomes

D

Mitochondria

Question 3: Palette 3/122

NEET 2026 MCQ

Choose the correct statements regarding cell organelles and their inclusions.

A. The endomembrane system includes Golgi complex, endoplasmic reticulum and mitochondria.

B. Rough endoplasmic reticulum bears ribosomes on its surface.

C. Both mitochondria and plastids have circular DNA.

D. A network of microtubules, microfilaments and intermediate filaments present in the cytoplasm is called cytoskeleton.

E. Mitochondrion is a single membrane-bound structure.

Choose the correct answer from the options given below :

A

A and B only

B

A, B and C only

C

C, D and E only

D

B, C and D only

Question 4: Palette 4/122

NEET 2026 MCQ

Select the correct statements regarding cell membrane in eukaryotic cell.

A. Membrane of human RBCs has approximately $52 \%$ protein.

B. Major phospholipids are arranged in a bilayer.

C. Extensions of the plasma membrane into the cell form mesosomes.

D. Tails towards the inner part of lipids are hydrophobic and thus protected from aqueous medium.

E. Glycocalyx is present on the outer surface of the plasma membrane.

Choose the correct answer from the options given below:

A

C, D and E only

B

B, C and E only

C

A, B and D only

D

A, C and E only

Question 5: Palette 5/122

NEET 2026 MCQ

 Mitochondrial inner membrane encloses $\_\_\_\_$ .

A

aqueous humor

B

matrix

C

cytosol

D

mucus

Question 6: Palette 6/122

NEET 2026 MCQ

Cell theory was formulated by $\_\_\_\_$

A

Antonie Von Leeuwenhoek

B

Schleiden and Schwann

C

Robert Brown

D

Singer and Nicolson

Question 7: Palette 7/122

NEET 2026 MCQ

The plastid that stores xanthophyll is known as $\_\_\_\_$ .

A

amyloplast

B

chloroplast

C

chromoplast

D

aleuroplast

Question 8: Palette 8/122

NEET 2026 MCQ

Smooth endoplasmic reticulum $\_\_\_\_$ .

A

is a site for the synthesis of carbohydrates

B

has ribosomes attached to its surface

C

is the major site for the synthesis of lipids

D

is actively involved in protein synthesis

Question 9: Palette 9/122

NEET 2026 MCQ

Which of the following are characteristics of prokaryotic cells?

(a) Ribosomes are made of 50 S and 30 S subunits

(b) They can have plasmids

(c) They contain mesosome

(d) They have peroxisomes

Choose the correct answer from the options given below :

A

(a), (b) and (c) only

B

(b) and (c) only

C

(a) and (c) only

D

(a), (c) and (d) only

Question 10: Palette 10/122

NEET 2026 MCQ

$ \text { Match List-I with List-II. } $

	List-I		List-II
A.	Cristae	1.	Flat membrane sacs in stroma of chloroplast
B.	Cisternae	II.	Infoldings in mitochondria
C.	Thylakoids	III.	Cell membrane
D.	Phospholipid	IV.	Disc shaped sacs in the Golgi apparatus

Choose the correct answer from the options given below:

A

A-IV, B-III, C-I, D-II

B

A-III, B-IV, C-I, D-II

C

A-II, B-IV, C-I, D-III

D

A-II, B-IV, C-III, D-I

Question 11: Palette 11/122

NEET 2026 MCQ

Endomembrane system includes $\_\_\_\_$ .

A

Golgi complex, chloroplast, peroxisomes and vacuole

B

endoplasmic reticulum, Golgi complex, Iysosomes and vacuole

C

endoplasmic reticulum, chloroplast, peroxisomes and vacuole

D

mitochondria, chloroplast, peroxisomes and vacuole

Question 12: Palette 12/122

NEET 2025 MCQ

Given below are two statements : one is labelled as Assertion (A), and the other is labelled as Reason (R).

Assertion (A) : The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.

Reason (R) : Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus.

In the light of the above statements, choose the correct answer from the options given below :

A

$\mathbf{A}$ is true but $\mathbf{R}$ is false

B

$\mathbf{A}$ is false but $\mathbf{R}$ is true

C

Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$

D

Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is not the correct explanation of $\mathbf{A}$

Question 13: Palette 13/122

NEET 2025 MCQ

From the statements given below choose the correct option :

A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.

B. Each ribosome has two sub-units.

C. The two sub-units of 80 S ribosome are 60 S and 40 S while that of 70 S are 50 S and 30 S .

D. The two sub-units of 80 S ribosome are 60 S and 20 S and that of 70 S are 50 S and 20 S .

E. The two sub-units of 80 S are 60 S and 30 S and that of 70 S are 50 S and 30 S .

A

A, B, E are true

B

B, D, E are true

C

A, B, C are true

D

A, B, D are true

Question 14: Palette 14/122

NEET 2025 MCQ

A specialised membranous structure in a prokaryotic cell which helps in cell well wall formation, DNA replication and respiration is

A

Cristae

B

Endoplasmic Reticulum

C

Mesosome

D

Chromatophores

Question 15: Palette 15/122

NEET 2025 MCQ

Match List-I with List- II.

	List - I		List - II
A	Centromere	I	Mitochondrion
B	Cilium	II	Cell division
C	Cristae	III	Cell movement
D	Cell membrane	IV	Phospholipid Bilayer

Choose the correct answer from the options given below :

A

A-IV, B-II, C-III, D-I

B

A-II, B-III, C-I, D-IV

C

A-I, B-II, C-III, D-IV

D

A-II, B-I, C-IV, D-III

Question 16: Palette 16/122

NEET 2024 MCQ

	List - I		List - II
(A)	Fleming	(I)	Disc shaped sacs or cisternae near cell nucleus
(B)	Robert Brown	(II)	Chromatin
(C)	George Palade	(III)	Ribosomes
(D)	Camillo Golgi	(IV)	Nucleus

Choose the correct answer from the options given below:

A

A-II, B-IV, C-III, D-I

B

A-II, B-III, C-I, D-IV

C

A-I, B-II, C-III, D-IV

D

A-IV, B-II, C-III, D-I

Question 17: Palette 17/122

NEET 2024 MCQ

Mesosome in a cell is a :

A

Membrane bound vesicular structure

B

Chain of many ribosomes attached to a single mRNA

C

Special structure formed by extension of plasma membrane

D

Medium sized chromosome

Question 18: Palette 18/122

NEET 2024 MCQ

Match List-I with List-II:

	List - I		List - II
(A)	Histones	(I)	Loosely packed chromatin
(B)	Nucleosome	(II)	Densely packed chromatin
(C)	Euchromatin	(III)	Positively charged basic proteins
(D)	Heterochromatin	(IV)	DNA wrapped around histone octamer

Choose the correct answer from the options given below:

A

A-IV, B-III, C-II, D-I

B

A-III, B-I, C-IV, D-II

C

A-II, B-III, C-IV, D-I

D

A-III, B-IV, C-I, D-II

Question 19: Palette 19/122

NEET 2024 MCQ

Match List-I with List-II.

	List - I		List - II
(A)	F$_1$ Particles	(I)	Chromosomes
(B)	Histones	(II)	Cillia
(C)	Axoneme	(III)	Golgi apparatus
(D)	Cisternae	(IV)	Mitochondria

Choose the correct answer from the options given below:

A

A-II, B-I, C-IV, D-III

B

A-IV, B-I, C-II, D-III

C

A-IV, B-I, C-III, D-II

D

A-IV, B-III, C-I, D-II

Question 20: Palette 20/122

NEET 2024 MCQ

Given below are two statements :

Statement I : Concentrically arranged cisternae of Golgi complex are arranged near the nucleus with distinct convex cis or maturing and concave trans or forming face.

Statement II : A number of proteins are modified in the cisternae of Golgi complex before they are released from cis face.

In the light of the above statements, choose the correct answer from the option given below.

A

Statement I is true but Statement II is false.

B

Statement I is false but Statement II is true.

C

Both Statement I and Statement II are true

D

Both Statement I and Statement II are false

Question 21: Palette 21/122

NEET 2024 MCQ

Match List I with List II

	List - I		List - II
A.	Nucleolus	I.	Site of formation of glycolipid
B.	Centriole	II.	Organization like the cartwheel
C.	Leucoplasts	III.	Site of active ribosomal RNA synthesis
D.	Golgi apparatus	IV.	For storing nutrients

Choose the correct answer from the options given below:

A

A-III, B-II, C-IV, D-I

B

A-II, B-III, C-I, D-IV

C

A-III, B-IV, C-II, D-I

D

A-I, B-II, C-III, D-IV

Question 22: Palette 22/122

NEET 2024 MCQ

The DNA present in chloroplast is:

A

Linear, double stranded

B

Circular, double stranded

C

Linear, single stranded

D

Circular, single stranded

Question 23: Palette 23/122

NEET 2024 MCQ

Match List I with List II :

	List - I		List - II
A.	Axoneme	I.	Centriole
B.	Cartwheel pattern	II.	Cilia and flagella
C.	Crista	III.	Chromosome
D.	Satellite	IV.	Mitochondria

Choose the correct answer from the options given below :

A

A-IV, B-III, C-II, D-I

B

A-IV, B-II, C-III, D-I

C

A-II, B-IV, C-I, D-III

D

A-II, B-I, C-IV, D-III

Question 24: Palette 24/122

NEET 2024 MCQ

Given below are two statements:

Statement I: Mitochondria and chloroplasts both double membranes bound organelles.

Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast.

In the light of the above statements, choose the mis appropriate answer from the options given below:

A

Both Statement I and Statement II are correct.

B

Both Statement I and Statement II are incorrect.

C

Statement I is correct but Statement II is incorrect.

D

Statement I is incorrect but Statement II is correct.

Question 25: Palette 25/122

NEET 2023 MCQ

Given below are two statements :

Statement I :- In bacteria, the mesosomes are formed by the extensions of plasma membrane.

Statement II :- The mesosomes, in bacteria, help in DNA replication and cell wall formation.

In the light of the above statements, choose the most appropriate answer from the options given below:

A

Statement I is correct but Statement II is incorrect.

B

Statement I is incorrect but Statement II is correct.

C

Both Statement I and Statement II are correct.

D

Both Statement I and Statement II are incorrect.

Question 26: Palette 26/122

NEET 2023 MCQ

Which of the following statements are correct with respect of Golgi apparatus ?

(A) It is the important site of formation of glycoprotein and glycolipids.

(B) It produces cellular energy in the form of ATP.

(C) It modifies the protein synthesized by ribosomes on ER.

(D) It facilitates the transport of ions.

(E) It provides mechanical support.

Choose the most appropriate answer from the options given below :

A

(B) and (C) only

B

(A) and (C) only

C

(A) and (D) only

D

(D) and (E) only

Question 27: Palette 27/122

NEET 2023 MCQ

In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as

A

Dedifferentiation

B

Development

C

Senescence

D

Differentiation

Question 28: Palette 28/122

NEET 2023 MCQ

How many different proteins does the ribosome consist of?

A

60

B

40

C

20

D

80

Question 29: Palette 29/122

NEET 2023 MCQ

Which of the following are NOT considered as the part of endomembrane system?

A. Mitochondria

B. Endoplasmic reticulum

C. Chloroplasts

D. Golgi complex

E. Peroxisomes

Choose the most appropriate answer from the options given below:

A

A, C and E only

B

A and D only

C

A, D and E only

D

B and D only

Question 30: Palette 30/122

NEET 2023 MCQ

Which of the following functions is carried out by cytoskeleton in a cell?

A

Protein synthesis

B

Motility

C

Transportation

D

Nuclear division

Question 31: Palette 31/122

NEET 2022 MCQ

The Phenomenon by which the undividing parenchyma cells start to divide mitotically during plant tissue culture is called as

A

Secondary growth

B

Differentiation

C

Dedifferentiation

D

Redifferentiation

Question 32: Palette 32/122

NEET 2022 MCQ

Match List-I with List-II

	List - I		List - II
(a)	Porins	(i)	Pink coloured nodules
(b)	leg haemoglobin	(ii)	Lumen of thylakoid
(c)	H$^+$ accumulation	(iii)	Amphibolic pathway
(d)	Respiration	(iv)	Huge pores in outer membrane of mitochondria

Choose the correct answer from the options given below.

A

(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

B

(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

C

(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)

D

(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

Question 33: Palette 33/122

NEET 2022 MCQ

Which type of substance would face difficulty to pass through the cell membrane?

A

Substance soluble in lipids

B

Substance with hydrophobic moiety

C

Substance with hydrophilic moiety

D

All substance irrespective of hydrophobic and hydrophilic moiety

Question 34: Palette 34/122

NEET 2022 MCQ

If the pH in lysosomes is increased to alkaline, what will be the outcome?

A

Lysosomal enzymes will be more active

B

Hydrolytic enzymes will function more efficiently

C

Hydrolytic enzymes will become inactive

D

Lysosomal enzymes will be released into the cytoplasm

Question 35: Palette 35/122

NEET 2022 MCQ

Which of the following statements with respect to Endoplasmic Reticulum is incorrect?

A

RER has ribosomes attached to ER

B

SER is devoid of ribosomes

C

prokaryotes only RER are present in

D

SER are the sites for lipid synthesis

Question 36: Palette 36/122

NEET 2021 MCQ

Which of the following is an incorrect statement?

A

Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplsm

B

Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles

C

Microbodies are present both in plant and animal cells

D

The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm

Question 37: Palette 37/122

NEET 2021 MCQ

Match List-I with List-II.

	List-I		List-II
(a)	Cristae	(i)	Primary constriction in chromosome
(b)	Thylakoids	(ii)	Disc-shaped sacs in Golgi apparatus
(c)	Centromere	(iii)	Infoldings in mitochondria
(d)	Cisternae	(iv)	Flattened membranous sacs in stroma of plastids

Choose the correct answer from the options given below.

A

(a)	(b)	(c)	(d)
(ii)	(iii)	(iv)	(i)

B

(a)	(b)	(c)	(d)
(iv)	(iii)	(ii)	(i)

C

(a)	(b)	(c)	(d)
(i)	(iv)	(iii)	(ii)

D

(a)	(b)	(c)	(d)
(iii)	(iv)	(i)	(ii)

Question 38: Palette 38/122

NEET 2021 MCQ

When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :

A

Acrocentric

B

Metacentric

C

Telocentric

D

Sub-metacentric

Question 39: Palette 39/122

NEET 2021 MCQ

The organelles that are included in the endomembrane system are

A

Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes

B

Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes

C

Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles

D

Golgi complex, Mitochondria, Ribosomes and Lysosomes

Question 40: Palette 40/122

NEET 2020 MCQ

Which of the following statements about inclusion bodies is incorrect?

A

These are involved in ingestion of food particles

B

They lie free in the cytoplasm

C

These represent reserve material in cytoplasm

D

They are not bound by any membrane

Question 41: Palette 41/122

NEET 2020 MCQ

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?

A

Peroxisomes

B

Golgi bodies

C

Polysomes

D

Endoplasmic reticulum

Question 42: Palette 42/122

NEET 2019 MCQ

Which of the following statements regarding mitochondria is incorrect?

A

Inner membrane is convoluted with infoldings

B

Mitochondrial matrix contains single circular DNA molecule and ribosomes

C

Outer membrane is permeable to monomers of carbohydrates, fats and proteins

D

Enzymes of electron transport are embedded in outer membrane

Question 43: Palette 43/122

NEET 2019 MCQ

Which of the following pair of organelles does not contains DNA?

A

Lysosomes and Vacuoles

B

Nuclear envelope and Mitochondria

C

Mitochodria and Lysosomes

D

Chloroplast and Vacuoles

Question 44: Palette 44/122

NEET 2019 MCQ

Which of the following statements is not correct?

A

Lysosomes are membrane bound structures.

B

Lysosomes are formed by the process of packaging in the endoplasmic reticulum.

C

Lysosomes have numerous hydrolytic enzymes.

D

The hydrolytic enzymes of lysosomes are active under acidic pH.

Question 45: Palette 45/122

NEET 2019 MCQ

The concept of ''Omnis cellula-e cellula'' regarding cell division was first proposed by :

A

Schleiden

B

Aristotle

C

Rudolf Virchow

D

Theodore Schwann

Question 46: Palette 46/122

NEET 2018 MCQ

The Golgi complex participates in

A

activation of amino acid

B

fatty acid breakdown

C

formation of secretory vesicles

D

respiration in bacteria

Question 47: Palette 47/122

NEET 2018 MCQ

Which of the following events does not occur in rough endoplasmic reticulum?

A

Cleavage of signal peptide

B

Phospholipid synthesis

C

Protein folding

D

Protein glycosylation

Question 48: Palette 48/122

NEET 2018 MCQ

Which of the following is true for nucleolus?

A

It takes part in spindle formation

B

Larger nucleoli are present in dividing cells.

C

It is a membrane-bound structure.

D

It is a site for active ribosomal RNA synthesis.

Question 49: Palette 49/122

NEET 2018 MCQ

Select the incorrect match.

A

Allosomes – Sex chromosomes

B

Sub-metacentric chromosomes – L-shaped chromosomes

C

Lampbrush chromosomes – Diplotene bivalents

D

Polytene chromosomes – Oocytes of amphibians

Question 50: Palette 50/122

NEET 2017 MCQ

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

A

Ribosome

B

Mitochondrion

C

Chloroplast

D

Lysosome

Question 51: Palette 51/122

NEET 2016 MCQ

A cell organelle containing hydrolytic enzymes is

A

Ribosome

B

Mesosome

C

Lysosome

D

Microsome

Question 52: Palette 52/122

NEET 2016 MCQ

Select the wrong statement-

A

Pili and fimbriae are mainly involved in motility of bacterial cells

B

Mycoplasma is a wall-less microorganism

C

Bacterial cell wall is made up of peptidoglycan

D

Cyanobacteria lack flagellated cells.

Question 53: Palette 53/122

NEET 2016 MCQ

Select the mismatch.

A

Large central vacuoles – Animal cells

B

Methanogens –Prokaryotes

C

Gas vacuoles – Green bacteria

D

Protists – Eukaryotes

Question 54: Palette 54/122

NEET 2016 MCQ

Mitochondria and chloroplast are-
(a) semi-autonomous organelles
(b) formed by division of pre existing organelles and they contain DNA but lack protein synthesising machinery
Which one of the following options is correct?

A

Both (a) and (b) are false

B

Both (a) and (b) are correct

C

(b) is true but (a) is false

D

(a) is true but (b) is false

Question 55: Palette 55/122

NEET 2016 MCQ

Microtubules are the constituents of

A

Cilia, Flagella and Peroxisomes

B

Centrosome, Nucleosome and Centrioles

C

Spindle fibres, Centrioles and Cilia

D

Centrioles, spindle fibres and chromatin

Question 56: Palette 56/122

NEET 2016 MCQ

Which one of the following cell organelles is enclosed by a single membrane?

A

Mitochondria

B

Chloroplasts

C

Lysosomes

D

Nuclei

Question 57: Palette 57/122

NEET 2015 MCQ

Which of the following are not membranebound ?

A

Ribosomes

B

Mesosomes

C

Lysosomes

D

Vacuoles

Question 58: Palette 58/122

NEET 2015 MCQ

Match the columns and identify the correct option.

Column I	Column II
(a) Thylakoids	(i) Disc-shaped sacs in Golgi apparatus
(b) Cristae	(ii) Condensed structure of DNA
(c) Cisternae	(iii) Flat membranous sacs in stroma
(d) Chromatin	(iv) Infoldings in mitochondria

A

(a) $ \to $ (iv), (b) $ \to $ (ii), (c) $ \to $ (i), (d) $ \to $ (iii)

B

(a) $ \to $ (iv), (b) $ \to $ (iii), (c) $ \to $ (i), (d) $ \to $ (ii)

C

(a) $ \to $ (iii), (b) $ \to $ (iv), (c) $ \to $ (i), (d) $ \to $ (ii)

D

(a) $ \to $ (iii), (b) $ \to $ (i), (c) $ \to $ (iv), (d) $ \to $ (ii)

Question 59: Palette 59/122

NEET 2015 MCQ

Which of the following structures is not found in a prokaryotic cell?

A

Mesosome

B

Nuclear envelope

C

Ribosome

D

Plasma membrane

Question 60: Palette 60/122

NEET 2015 MCQ

Cellular organelles with membranes are -

A

endoplasmic reticulum, ribosomes and nuclei

B

lysosomes, Golgi apparatus and mitochondria

C

nuclei, ribosomes and mitochondria

D

chromosomes, ribosomes and endoplasmic reticulum

Question 61: Palette 61/122

NEET 2015 MCQ

Which one of the following is not an inclusion body found in prokaryotes?

A

Cyanophycean granule

B

Phosphate granule

C

Polysome

D

Glycogen granule

Question 62: Palette 62/122

NEET 2015 MCQ

The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are

A

Stroma lamellae

B

Cristae

C

Stroma

D

Grana

Question 63: Palette 63/122

NEET 2015 MCQ

DNA is not present in :

A

Nucleus

B

Chloroplast

C

Mitochondria

D

Ribosomes

Question 64: Palette 64/122

NEET 2015 MCQ

The chromosomes in which centromere is situated close to one end are :

A

Telocentric

B

Metacentric

C

Sub-metacentric

D

Acrocentric

Question 65: Palette 65/122

NEET 2015 MCQ

Nuclear envelope is a derivative of :

A

Membrane of Golgi complex

B

Smooth endoplasmic reticulum

C

Rough endoplasmic reticulum

D

Microtubules

Question 66: Palette 66/122

NEET 2015 MCQ

Select the correct matching in the following pairs :

A

Rough ER – Oxidation of fatty acids

B

Smooth ER – Oxidation of phospholipids

C

Rough ER – Synthesis of glycogen

D

Smooth ER – Synthesis of lipids

Question 67: Palette 67/122

NEET 2014 MCQ

Match the following and select the correct answer :

(a) Centriole	(i) Infoldings in mitochondria
(b) Chlorophyll	(ii) Thylakoids
(c) Cristae	(iii) Nucleic acid
(d) Ribozymes	(iv) Basal body cilia or flagella

A

(a) $ \to $ (iv), (b) $ \to $ (iii), (c) $ \to $ (i), (d) $ \to $ (ii)

B

(a) $ \to $ (i), (b) $ \to $ (iii), (c) $ \to $ (ii), (d) $ \to $ (iv)

C

(a) $ \to $ (iv), (b) $ \to $ (ii), (c) $ \to $ (i), (d) $ \to $ (iii)

D

(a) $ \to $ (i), (b) $ \to $ (ii), (c) $ \to $ (iv), (d) $ \to $ (iii)

Question 68: Palette 68/122

NEET 2014 MCQ

The osmotic expansion of a cell kept in water is chiefly regulated by:

A

Vacuoles

B

Plastids

C

Mitochondria

D

Ribosomes

Question 69: Palette 69/122

NEET 2014 MCQ

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:

A

Microfilaments

B

Lamins

C

Microtubules

D

Intermediate filaments

Question 70: Palette 70/122

NEET 2013 MCQ

Which of the following best illustrates "FEEDBACK" in development ?

A

As tissue (X) develops, it secretes something that induces tissue (Y) to develop

B

As tissues (X) develops, it secretes something that shows down the growth of tissue (Y)

C

Tissue (X) secretes RNA which changes the development of tissue (Y)

D

As tissue (X) develops, it secretes enzymes that inhibit the development of tissue (Y)

Question 71: Palette 71/122

NEET 2013 MCQ

Which of the following types of plastids does not contain stored food material ?

A

Eleioplasts

B

Chromoplasts

C

Amyloplasts

D

Aleuroplasts

Question 72: Palette 72/122

NEET 2013 MCQ

Select the alternative giving correct identification and function of the organelle 'A' in the diagram

A

Golgi body - provides packaging material

B

Mitochondria - produce cellular energy in the form of ATP

C

Endoplasmic reticulum - synthesis of lipids

D

Lysosomes - secrete hydrolytic enzymes

Question 73: Palette 73/122

NEET 2013 MCQ

The term 'glycocalyx' is used for :

A

bacterial cell glyco-engineered to possess N-glycosylated proteins

B

a layer present between cell wall and membrane of bacteria

C

a layer surrounding the cell wall of bacteria

D

cell wall of bacteria

Question 74: Palette 74/122

NEET 2013 MCQ

A major site for synthesis of lipids is :

A

RER

B

Nucleoplasm

C

SER

D

Symplast

Question 75: Palette 75/122

NEET 2013 MCQ

The Golgi complex plays a major role :

A

as energy transferring organelles

B

in post translational modification of proteins and glycosidation of lipids

C

in trapping the light and transforming it into chemical energy

D

in digensting proteins and carbohydrates

Question 76: Palette 76/122

NEET 2013 MCQ

Which one of the following organelle in the figure correctly matches with its function ?

A

Golgi apparatus, formation of glycolipids

B

Rough endoplasmic reticulum, formation of glycoproteins

C

Rough endoplasmic reticulum, protein synthesis

D

Golgi apparatus, protein synthesis

Question 77: Palette 77/122

NEET 2012 MCQ

Which one of the following structures is an organelle within an organelle ?

A

Mesosome

B

Peroxisome

C

Ribosome

D

ER

Question 78: Palette 78/122

NEET 2012 MCQ

Which one of the following cellular parts is correctly described ?

A

Lysosomes - optimally active at a pH of about 8.5

B

Centrioles - sites for active RNA synthesis

C

Thylakoids - flattened membranous sacs forming the grana of chloroplasts

D

Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)

Question 79: Palette 79/122

NEET 2012 MCQ

What is true about ribosomes ?

A

These are self - splicing introns of some RNAs.

B

These are found only in eukaryotic cells

C

There are composed of ribonucleic acid and proteins

D

The prokaryotic ribosomes are 80 S, where 'S' stands for sedimentation coefficient.

Question 80: Palette 80/122

NEET 2012 MCQ

Select the the correct statement from the following regarding cell membrane

A

Na⁺ and K⁺ ions move across cell membrane by passive transport

B

Lipids are arranged in bilayer with polar heads towards the inner part

C

Proteins make up 60 to 70% of the cell membrane

D

Fluid mosaic model of cell membrane was proposed by singer and Nicolson

Question 81: Palette 81/122

NEET 2012 MCQ

Which one of the following does not differ in E.coli and Chlamydomonas ?

A

Chromosomal Organization

B

Cell wall

C

Ribosomes

D

Cell membrane

Question 82: Palette 82/122

NEET 2011 MCQ

Which one of the following is not considered as a part of the endomembrane system ?

A

Vacuole

B

Lysosome

C

Golgi complex

D

Peroxisome

Question 83: Palette 83/122

NEET 2011 MCQ

The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C). and (D) Select the part correctly matched with its function. –

A

Part (B) : Inner membrane – forms infoldings called cristae

B

Part (C) : Cristae – possess single circular DNA molecule and ribosome

C

Part (A) : Matrix – major site for respiratory chain enzymes

D

Part (D) : Outer membrane – gives rise to inner membrane by splitting

Question 84: Palette 84/122

NEET 2011 MCQ

Important site for formation of glycoproteins and glycolipids is :

A

Plastid

B

Lysosome

C

Golgi apparatus

D

Vacuole

Question 85: Palette 85/122

NEET 2011 MCQ

Peptide synthesis inside a cell takes place in :

A

Chromoplast

B

Ribosomes

C

Chloroplast

D

Mitochondria

Question 86: Palette 86/122

NEET 2010 MCQ

Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with – Components :
(i) Cristae of mitochondria
(ii) Inner membrane of mitochondria
(iii) Cytoplasm
(iv) Smooth endoplasmic reticulum
(v) Rough endoplasmic reticulum
(vi) Mitochondrial matrix
(vii) Cell vacuole
(viii) Nucleus
The correct components are :

A

(A) $ \to $ (v), (B) $ \to $ (iv), (C) $ \to $ (viii), (D) $ \to $ (iii)

B

(A) $ \to $ (i), (B) $ \to $ (iv), (C) $ \to $ (viii), (D) $ \to $ (vi)

C

(A) $ \to $ (v), (B) $ \to $ (i), (C) $ \to $ (iii), (D) $ \to $ (ii)

D

(A) $ \to $ (vi), (B) $ \to $ (v), (C) $ \to $ (iv), (D) $ \to $ (vii)

Question 87: Palette 87/122

NEET 2010 MCQ

An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called -

A

Cytoskeleton

B

Endosplasmic Reticulum

C

Thylakoid

D

Plasmalemma

Question 88: Palette 88/122

NEET 2010 MCQ

Which one of the following has its own DNA?

A

Dictyosome

B

Mitochondria

C

Peroxisome

D

Lysosome

Question 89: Palette 89/122

NEET 2010 MCQ

Which one of the following structures between two adjacent cells is an effective transport pathway?

A

Endoplasmic reticulum

B

Plasmodesmata

C

Plasmalemma

D

Plastoquinones

Question 90: Palette 90/122

NEET 2010 MCQ

The plasma membrane consists mainly of –

A

proteins embedded in a carbohydrate bilayer

B

phospholipids embedded in a protein bilayer

C

proteins embedded in a phospholipid bilayer

D

proteins embedded in a polymer of glucose molecules

Question 91: Palette 91/122

NEET 2010 MCQ

The main area of variuos types of activites of a cell is –

A

Cytoplasm

B

Plasma membrane

C

Nucleus

D

Mitochondrian

Question 92: Palette 92/122

NEET 2009 MCQ

Middle lamella is composed mainly of :

A

Calcium pectate

B

Phosphoglycerides

C

Muramic acid

D

Hemicellulose

Question 93: Palette 93/122

NEET 2009 MCQ

Cytoskeleton is made up of :

A

Cellulose microfibrils

B

Proteinaceous filaments

C

Calcium carbonate granules

D

Callose deposits

Question 94: Palette 94/122

NEET 2009 MCQ

Plasmodesmata are :

A

Locomotory structures

B

Connection between adjacent cells

C

Membranes connecting the nucleus with plasmalemma

D

Lignified cemented layers between cells

Question 95: Palette 95/122

NEET 2008 MCQ

Vacuole in a plant cell:

A

is membrane-bound and contains storage proteins and lipids

B

is membrane-bound and contains water and excretory substances

C

lacks membrane and contains air

D

Lacks membrane and contains water and excretory substances

Question 96: Palette 96/122

NEET 2008 MCQ

In germinating seeds fatty acids are degraded exclusively in the:

A

proplastids

B

peroxisomes

C

glyoxysomes

D

mitochondria

Question 97: Palette 97/122

NEET 2008 MCQ

The two sub-units of ribosome remain united at a critical ion level of :

A

magnesium

B

manganese

C

calcium

D

copper

Question 98: Palette 98/122

NEET 2008 MCQ

Keeping in view the "fluid mosaic model" for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flipflop movement)?

A

Both lipids and proteins can flip-flop

B

While lipids can rarely flip-flop proteins cannot

C

While proteins can flip-flop, lipids cannot

D

neither lipids, nor proteins can flip-flop

Question 99: Palette 99/122

NEET 2007 MCQ

Select the wrong statement from the following:

A

The chloroplasts are generally much larger than mitochondria

B

Both chloroplasts and mitochondria contain DNA

C

Both chloroplasts and mitochondria contain an inner and an outer membrane

D

Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane

Question 100: Palette 100/122

NEET 2007 MCQ

Biological organization starts with:-

A

Cellular level

B

Atomic level

C

Organismic level

D

Submicroscopic molecular level

Question 101: Palette 101/122

NEET 2007 MCQ

Which one of the following is not a constituent of cell membrane ?

A

Glycolipids

B

Proline

C

Phospholipids

D

Cholesterol

Question 102: Palette 102/122

NEET 2006 MCQ

A major breakthrough in the studies of cells came with the development of electron microscope. This is because

A

Electron beam can pass through thick materials, whereas light microscopy requires thin sections

B

The resolution power of the electron microscope is much higher than that of the light microscope

C

The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons

D

The resolving power of the electron microscope is 200-350 nm as compared to 0.1-0.2 nm for the light microscope

Question 103: Palette 103/122

NEET 2006 MCQ

Which of the following statements regarding cilia is not correct ?

A

Microtubules of cilia are composed of tubulin

B

The organized beating of cilia is controlled by fluxes of Ca²⁺ across the membrane

C

Cilia are hair-like cellular appendages

D

Cilin contain an outer ring of nine doublet microtubules surrounding two single microtubules

Question 104: Palette 104/122

NEET 2006 MCQ

Which of the following statements regarding mitochondrial membrane is not correct ?

A

The inner membrane is highly convoluted forming a series of infoldings

B

The outer membrane resembles a sieve

C

The outer membrane is permeable to all kinds of molecules

D

The enzymes of the electron transfer chain are embedded in the outer membrane

Question 105: Palette 105/122

NEET 2005 MCQ

A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as get the best possible resolution ?

A

Yellow

B

Red

C

Blue

D

Green

Question 106: Palette 106/122

NEET 2005 MCQ

Chlorophyll in chloroplasts is located in

A

Stroma

B

Grana

C

Pyrenoid

D

Both (A) and (C)

Question 107: Palette 107/122

NEET 2005 MCQ

Centromere is required for -

A

Crossing over

B

Movement of chromosomes towards poles

C

Transcription

D

Cytoplasmic cleavage

Question 108: Palette 108/122

NEET 2005 MCQ

The main organelle involved in modification and routing of newly synthesized proteins to their destinations is -

A

Mitochondria

B

Endoplasmic Reticulum

C

Chloroplast

D

Lysosome

Question 109: Palette 109/122

NEET 2005 MCQ

Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on

A

Proton gradient

B

Membrane potential

C

Accumulation of Na⁺ ions

D

Accumulation of K⁺ ions

Question 110: Palette 110/122

NEET 2005 MCQ

According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements are incorrect ?

A

Proteins in cell membranes can travel within the lipid bilayer

B

Proteins can also undergo flip-flop movements in the lipid bilayer

C

Proteins can remain confined within certain domains of the membranes

D

Many proteins remain completely embedded within the lipid bilayer

Question 111: Palette 111/122

NEET 2004 MCQ

The telomeres of eukaryotic chromosomes consist of short sequences of

A

Adenine rich repeats

B

Cytosine rich repeats

C

Thymine rich repeats

D

Guanine rich repeats

Question 112: Palette 112/122

NEET 2004 MCQ

In chloroplasts, chlorophyll is present in the :-

A

Outer membrane

B

Inner membrane

C

Thylakoids

D

Stroma

Question 113: Palette 113/122

NEET 2003 MCQ

Cellular totipotency is demonstrated by :-

A

All eukaryotic cells

B

Only gymnosperm cells

C

Only bacterial cells

D

All plant cells

Question 114: Palette 114/122

NEET 2002 MCQ

Ribosomes are produced in :

A

Mitochondria

B

Golgibody

C

Nucleolus

D

Cytoplasm

Question 115: Palette 115/122

NEET 2002 MCQ

In fluid mosaic model of plasma membrane

A

Phospholipids form a bimolecular layer in middle part

B

Upper layer is non-polar and hydrophilic

C

Proteins form a middle layer

D

Polar layer is hydrophobic

Question 116: Palette 116/122

NEET 2001 MCQ

Microtubules are absent in : -

A

Spindle fibres

B

Mitochondria

C

Centriole

D

Flagella

Question 117: Palette 117/122

NEET 2001 MCQ

Element necessary for the middle lamella is

A

K

B

Cu

C

Ca

D

Zn

Question 118: Palette 118/122

NEET 2001 MCQ

Proteinaceous pigment which control the activities concerned with light is

A

Carotenoids

B

Phytochrome

C

Chlorophyll

D

Anthocyanin

Question 119: Palette 119/122

NEET 2000 MCQ

Which cell organelle is concerned with glycosylation of protein ?

A

Endoplasmic reticulum

B

Ribosome

C

Mitochondria

D

Peroxisome

Question 120: Palette 120/122

NEET 2000 MCQ

Lysosome contains :

A

Reductive enzymes

B

Oxidative enzymes

C

Anabolic enzymes

D

Hydrolytic enzymes

Question 121: Palette 121/122

NEET 2000 MCQ

Which of the following ribosomes are engaged in protein synthesis in animal cell ?

A

Ribosomes of only nucleolus and cytosol

B

Ribosomes which occur on nuclear membrane and E.R.

C

Ribosomes of only mitochondria and cytosol

D

Ribosomes of only cytosol

Question 122: Palette 122/122

NEET 2000 MCQ

Function of telomeres in nucleus is

A

To seal the ends of chromosome

B

Poleward movement

C

To recognize the homologous chromosome

D

To initiate the RNA synthesis