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Cell_ The Unit Of Life

214 Questions Start Allen Test
All Exams Allen
1931 Q1 Allen 10. NCERT BASED QUESTIONS MCQ
Nucleus as a "cell organelle" was first described by ..... as early as......
A.
Robert Hooke, 1665
B.
Robert Brown, 1831
C.
Flemming, 1931
D.
Strasburger, 1831
Q2 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Which of the following is not correct?
A.
Robert Brown discovered the cell.
B.
Schleiden and Schwann formulated the cell theory.
C.
Virchow explained that cells are formed from pre-existing cells.
D.
A unicellular organism carries out its life activities within a single cell.
Q3 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
The main arena of various types of activities of a cell is:
A.
Nucleus
B.
Plasma membrane
C.
Mitochondria
D.
Cytoplasm
Q4 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Cell membrane is composed of :-
A.
Proteins and cellulose
B.
Proteins and phospholipids
C.
Proteins and carbohydrates
D.
Proteins, phospholipids and some carbohydrates
Q5 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Carbohydrates are present in the plasma membrane in the form of :ā€”
A.
Hemicellulose
B.
Cellulose
C.
Starch
D.
Glycoprotein
Q6 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Carbohydrates which are present in the cell membrane take part in :ā€”
A.
Transport of substance
B.
Cell recognition
C.
Attachment to microfilament
D.
Attachment to microtubules
Q7 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
plasma membraneis fluidstructure due to precence of:-
A.
Carbohydrates
B.
Lipid
C.
Glycoprotein
D.
Polysaccharide
Q8 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
The fluid nature of the membrane is helpful in function of :-
A.
Cell growth
B.
Cell division
C.
Endocytosis
D.
All the above
Q9 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Plasma membrane is :ā€”
A.
Selectively permeable
B.
Permeable
C.
Impermeable
D.
Semipermeable
Q10 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
In fluid mosaic model of plasma membrane:
A.
Upper layer is non-polar and hydrophilic
B.
Polar layer is hydrophobic
C.
Phospholipids form a bimolecular layer in middle part
D.
Proteins form a middle layer
Q11 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Which of the following is correct:
A.
Cells of all living organisms have a nucleus.
B.
Both animal and plant cells have a well defined cell wall.
C.
In prokaryotes, there are no membrane bound organelles.
D.
Cells are formed de novo from abiotic materials.
Q12 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL 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
Q13 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Select the correct statement from the following regarding cell membrane: -
A.
Lipids are arranged in a bilayer with polar heads towards the inner part
B.
Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
C.
Na $^{+}$ and K $^{+}$ ions move across cell membrane by passive transport
D.
Proteins make up 60 to 70% of the cell membrane
Q14 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
The chemical substance abundantly present in middle lamella is :ā€”
A.
Cutin
B.
Chitin
C.
Lignin
D.
Pectin
Q15 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Which of the following is capable of growth and gradually diminishes as the cell matures?
A.
Primary cell wall
B.
Secondary cell wall
C.
Middle lamella
D.
Cell membrane
Q16 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Plasmodesmata are: -
A.
Connections between adjacent cells
B.
Lignified cemented layers between cells
C.
Locomotary structures
D.
Membranes connecting the nucleus with plasmalemma
Q17 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Middle lamella is composed mainly of:-
A.
Phosphoglycerides
B.
Hemicellulose
C.
Muramic acid
D.
Calcium pectate
Q18 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Which one of the following structures between two adjacent cells is an effective transport pathway?
A.
Plasmalemma
B.
Plasmodesmata
C.
Plastoquinone
D.
Endoplasmic reticulum
Q19 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Algae have cell wall made up of:
A.
Cellulose, hemicellulose and pectins
B.
Cellulose, galactans and mannans
C.
Hemicellulose, pectins and proteins
D.
Pectins, cellulose and proteins
Q20 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
Ingestion of large molecules by a cell is called -
A.
Diffusion
B.
Osmosis
C.
Exocytosis
D.
Endocytosis
Q21 Allen 1. CELL THEORY, CELL MEMBRANE AND CELL WALL MCQ
The main lipid components of the plant cell membrane are :-
A.
Phosphodiester
B.
Glycocalyx
C.
Peptidoglycan
D.
Phosphoglyceride
Q22 Allen 2. ER, GOLGI COMPLEX AND LYSOSOME MCQ
Hydrolytic enzymes are abundantly found in which cell organelles?
A.
Ribosome
B.
Lysosome
C.
Golgi body
D.
Endoplasmic reticulum
Q23 Allen 2. ER, GOLGI COMPLEX AND LYSOSOME MCQ
At which pH lysosomal enzymes become active?
A.
pH - 5
B.
pH - 7
C.
pH - 8
D.
pH - 10
Q24 Allen 2. ER, GOLGI COMPLEX AND LYSOSOME MCQ
Which cell organelle(s) take(s) part in the formation of lysosomes?
A.
Endoplasmic reticulum
B.
Golgi bodies
C.
Both (1) and (2)
D.
Mitochondria
Q25 Allen 2. ER, GOLGI COMPLEX AND LYSOSOME MCQ
A single unit membrane organelle is :-
A.
Ribosome
B.
Mitochondria
C.
Chloroplast
D.
Lysosome