2023
NEET
MCQ
NEET 2023 Manipur
Which of the following mineral ion is not remobilized in plants?
A.
Potassium
B.
Calcium
C.
Nitrogen
D.
Phosphorus
2023
NEET
MCQ
NEET 2023 Manipur
Match Column I with Column II.
| Column - I | Column - II | ||
|---|---|---|---|
| (A) | Nitrococcus | (I) | Denitrification |
| (B) | Rhizobium | (II) | Conversion of ammonia to nitrite |
| (C) | Thiobacillus | (III) | Conversion of nitrite to nitrate |
| (D) | Nitrobacter | (IV) | Conversion of atmospheric nitrogen to ammonia |
A.
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
B.
(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
C.
(A)-(II), (B)-(IV), (C)-(I), (D)-(III)
D.
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
2023
NEET
MCQ
NEET 2023
Which micronutrient is required for splitting of water molecule during photosynthesis?
A.
Molybdenum
B.
Magnesium
C.
Copper
D.
Manganese
2023
NEET
MCQ
NEET 2023
Match List I with List II:
| List I | List II | ||
|---|---|---|---|
| (A) | Iron | (I) | Synthesis of auxin |
| (B) | Zinc | (II) | Component of nitrate reductase |
| (C) | Boron | (III) | Activator of catalase |
| (D) | Molybdenum | (IV) | Cell elongation and differentiation |
Choose the correct answer from the options given below:
A.
A-II, B-III, C-IV, D-I
B.
A-III, B-I, C-IV, D-II
C.
A-II, B-IV, C-I, D-III
D.
A-III, B-II, C-I, D-IV
2022
NEET
MCQ
NEET 2022 Phase 2
Which of the following protects nitrogenase inside the root nodule of a leguminous plant?
A.
Glutamate dehydrogenase
B.
Catalase
C.
leg haemoglobin
D.
Transaminase
2022
NEET
MCQ
NEET 2022 Phase 1
Match List-I with List-II
| List - I | List - II | ||
|---|---|---|---|
| (a) | Manganese | (i) | Activates the enzyme catalase |
| (b) | Magnesium | (ii) | Required for pollen germination |
| (c) | Boron | (iii) | Activates enzymes of respiration |
| (d) | Iron | (iv) | Functions in splitting of water during photosynthesis |
Choose the correct answer from the options given below:
A.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
B.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
C.
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
D.
(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
2022
NEET
MCQ
NEET 2022 Phase 1
Which one of the following produces nitrogen fixing nodules on the roots of Alnus?
A.
Rhizobium
B.
Frankia
C.
Rhodospirillum
D.
Beijerinckia
2021
NEET
MCQ
NEET 2021
Match Column - I with Column - II.
Choose the correct answer from options given below.
| Column-I | Column-II | ||
|---|---|---|---|
| (a) | Nitrococcus | (i) | Denitrification |
| (b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
| (c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
| (d) | Nitrobacter | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from options given below.
A.
| (a) | (b) | (c) | (d) |
|---|---|---|---|
| (iv) | (iii) | (ii) | (i) |
B.
| (a) | (b) | (c) | (d) |
|---|---|---|---|
| (ii) | (iv) | (i) | (iii) |
C.
| (a) | (b) | (c) | (d) |
|---|---|---|---|
| (i) | (ii) | (iii) | (iv) |
D.
| (a) | (b) | (c) | (d) |
|---|---|---|---|
| (iii) | (i) | (iv) | (ii) |
2020
NEET
MCQ
NEET 2020 Phase 1
Match the following concerning essential elements and their functions in plants
(a) Iron (i) Photolysis of water
(b) Zinc (ii) Pollen germination
(c) Boron (iii) Required for chlorophyll biosynthesis
(d) Manganese (iv) IAA biosynthesis
Select the correct option
(a) Iron (i) Photolysis of water
(b) Zinc (ii) Pollen germination
(c) Boron (iii) Required for chlorophyll biosynthesis
(d) Manganese (iv) IAA biosynthesis
Select the correct option
A.
(A) $ \to $ (iv), (B) $ \to $ (iii), (C) $ \to $ (ii), (D) $ \to $ (i)
B.
(A) $ \to $ (iv), (B) $ \to $ (i), (C) $ \to $ (ii), (D) $ \to $ (iii)
C.
(A) $ \to $ (iii), (B) $ \to $ (iv), (C) $ \to $ (ii), (D) $ \to $ (i)
D.
(A) $ \to $ (ii), (B) $ \to $ (i), (C) $ \to $ (iv), (D) $ \to $ (iii)
2020
NEET
MCQ
NEET 2020 Phase 1
The product(s) of reaction catalyzed by
nitrogenase in root nodules of leguminous
plants is/are
A.
Ammonia alone
B.
Nitrate alone
C.
Ammonia and oxygen
D.
Ammonia and hydrogen
2018
NEET
MCQ
NEET 2018
Which of the following elements is responsible
for maintaining turgor in cells?
A.
Sodium
B.
Calcium
C.
Magnesium
D.
Potassium
2018
NEET
MCQ
NEET 2018
In which of the following forms is iron absorbed
by plants?
A.
Ferrous
B.
Both ferric and ferrous
C.
Ferric
D.
Free element
2018
AIIMS
MCQ
AIIMS 2018
Azolla is used as a biofertiliser because it
A.
has association of mycorrhiza
B.
multiplies at faster rate to produce massive biomass
C.
has association of nitrogen-fixing Rhizobium
D.
has association of nitrogen-fixing cyanobacteria
2018
AIIMS
MCQ
AIIMS 2018
Assertion Nitrogen-fixing bacteria of legume root nodules survive in oxygen depleted cells.
Reason Leghaemoglobin completely removes oxygen from nodule cells.
A.
Both A and R are true and R is the correct explanation of A
B.
Both A and R are true, but R is not the correct explanation of A
C.
A is true, but R is false
D.
A and R are false
2018
AIIMS
MCQ
AIIMS 2018
Assertion Magnesium is important in photosynthesis and carbohydrate metabolism.
Reason $\mathrm{Mg}^{2+}$ is involved in the synthesis of nucleic acids.
A.
Both A and R are true and R is the correct explanation of A
B.
Both A and R are true, but R is not the correct explanation of A
C.
A is true, but R is false
D.
A and R are false
2016
NEET
MCQ
NEET 2016 Phase 2
Which is essential for the growth of root tip?
A.
Zn
B.
Fe
C.
Ca
D.
Mn
2016
NEET
MCQ
NEET 2016 Phase 1
In which of the following all three are macronutrients?
A.
Molybdenum, magnesium, manganese
B.
Nitrogen, phosphorus, sulphur
C.
Boron, Zinc, manganese
D.
Iron, copper, molybdenum
2015
NEET
MCQ
AIPMT 2015
The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
A.
Magnesium and Molybdenum
B.
Magnesium and Chlorine
C.
Manganese and chlorine
D.
Manganese and Potassium
2015
NEET
MCQ
AIPMT 2015
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
A.
carotene
B.
cytochrome
C.
leghaemoglobin
D.
xanthophyll.
2015
NEET
MCQ
AIPMT 2015 Cancelled Paper
Minerals known to be required in large amounts for plant growth include
A.
potassium, phosphorus, selenium, boron
B.
magnesium, sulphur, iron, zinc
C.
phosphorus, potassium, sulphur, calcium
D.
calcium, magnesium, manganese, copper.
2014
NEET
MCQ
AIPMT 2014
Deficiency symptoms of nitrogen and potassium are visible first in
A.
senescent leaves
B.
young leaves
C.
roots
D.
buds.
2013
NEET
MCQ
NEET 2013 (Karnataka)
Specialized cells for fixing atmospheric nitrogen in Nostoc are
A.
heterocysts
B.
hormogonia
C.
modules
D.
akinetes.
2013
NEET
MCQ
NEET 2013 (Karnataka)
Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere?
A.
Aerobic nitrate oxidation and nitrate reduction
B.
Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
C.
Enteric fermentation in cattle and nitrogen fixation by Rhizobium in root nodules of legumes
D.
Anaerobic ammonium oxidation and denitrification
2013
NEET
MCQ
NEET 2013 (Karnataka)
Which of the following elements is a constituent of biotin?
A.
Magnesium
B.
Calcium
C.
Phosphorus
D.
Sulphur
2013
NEET
MCQ
NEET 2013
The first stable product of fixaation of atmospheric nitrogen in leguminous plants is
A.
NO$_3^ - $
B.
glutamate
C.
NO$_2^ - $
D.
ammonia.
2012
NEET
MCQ
AIPMT 2012 Mains
For its action, nitrogenase requires
A.
high input of energy
B.
light
C.
Mn2+
D.
super oxygen radicals.
2012
NEET
MCQ
AIPMT 2012 Prelims
Which one of the following is correctly matched?
A.
Passive transport of nutrients $-$ ATP
B.
Apoplast $-$ Plasmodesmata
C.
Potassium $-$ Readily immobilisation
D.
Bakane of rice seedlings $-$ F. Skoog.
2012
NEET
MCQ
AIPMT 2012 Prelims
Best defined function of manganese in green plants is
A.
photolysis of water
B.
Calvin cycle
C.
nitrogen fixation
D.
water absorption.
2011
NEET
MCQ
AIPMT 2011 Mains
Which one of the following is not an essential mineral element for plants while the remaining three are?
A.
Iron
B.
Manganese
C.
Cadmium
D.
Phosphorus
2011
NEET
MCQ
AIPMT 2011 Prelims
Which one of the following elements in plants is not remobilised?
A.
Phosphorus
B.
Calcium
C.
Potassium
D.
Sulphur
2011
NEET
MCQ
AIPMT 2011 Prelims
Which one of the following helps in absorption of phosphorus from soil by plants?
A.
Glomus
B.
Rhizobium
C.
Frankia
D.
Anabaena
2011
NEET
MCQ
AIPMT 2011 Prelims
Nitrifying bacteria
A.
oxidize ammonia to nitrates
B.
convert free nitrogen to nitrogen compounds
C.
convert proteins into ammonia
D.
reduce nitrates to free nitrogen.
2011
NEET
MCQ
AIPMT 2011 Prelims
The function of leghaemoglobin in the root nodules of legumes is
A.
inhibition of nitrogenase activity
B.
oxygen differentiation
C.
nodule differentiation
D.
expression of nif gene.
2010
NEET
MCQ
AIPMT 2010 Mains
Study the cycle shown below and select the option which gives correct words for all the four blanks A, B, C and D.
A.
| A | B | C | D | |||
|---|---|---|---|---|---|---|
| Nitrification | Ammoni fication | Animals | Plants |
B.
| A | B | C | D | |||
|---|---|---|---|---|---|---|
| Denitrification | Ammoni fication | Plants | Animals |
C.
| A | B | C | D | |||
|---|---|---|---|---|---|---|
| Nitrification | Denitrification | Animals | Plants |
D.
| A | B | C | D | |||
|---|---|---|---|---|---|---|
| Denitrification | Nitrification | Plants | Animals |
2010
NEET
MCQ
AIPMT 2010 Mains
Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen through the process of symbiotic nitrogen fixation. which one of the following statements is not correct during this process of nitrogen fixation?
A.
Leghaemoglobin scavenges oxygen and is pinkish in colour.
B.
Nodules act as sites for nitrogen fixation.
C.
The enzyme nitrogenase catalyses the conversion of atmospheric N2 to NH3
D.
Nitrogenase is insensitive to oxygen.
2010
NEET
MCQ
AIPMT 2010 Prelims
Which one of the following is not a micronutrient?
A.
Molybdenum
B.
Magnesium
C.
Zinc
D.
Boron
2010
NEET
MCQ
AIPMT 2010 Prelims
An element playing important role in nitrogen fixation is
A.
molybdenum
B.
copper
C.
manganese
D.
zinc.
2009
NEET
MCQ
AIPMT 2009
Manganese is required in
A.
plant cell wall formation
B.
photolysis of water during photosynthesis
C.
chlorophyll synthesis
D.
nucleic acid synthesis.
2007
NEET
MCQ
AIPMT 2007
A plant requires magnesium for
A.
protein synthesis
B.
chlorophyll synthesis
C.
cell wall development
D.
holding cells together.
2007
NEET
MCQ
AIPMT 2007
Which one of the following elements is not an essential micronutrient for plant growth?
A.
Zn
B.
Cu
C.
Ca
D.
Mn
2006
NEET
MCQ
AIPMT 2006
Sulphur is an important nutrient for optimum growth and productivity in
A.
oilseed crops
B.
pulse crops
C.
cereals
D.
fibre crops.
2005
NEET
MCQ
AIPMT 2005
The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?
A.
Co, Ni, Mo
B.
Ca, K, Na
C.
Mn, Co, Ca
D.
Cu, Mn, Fe
2004
NEET
MCQ
AIPMT 2004
If by radiation all nitrogenase enzyme are inactivated, then there will be no
A.
fixation of nitrogen in legumes
B.
fixation of atmospheric nitrogen
C.
conversion from nitrate to nitrite in legumes
D.
conversion from ammonium to nitrate in soil.
2003
NEET
MCQ
AIPMT 2003
Gray spots of oat are caused by deficiency of
A.
Cu
B.
Zn
C.
Mn
D.
Fe
2003
NEET
MCQ
AIPMT 2003
Boron in green plants assists in
A.
activation of enzymes
B.
acting as enzyme co-factor
C.
photossynthesis
D.
sugar transport.
2002
NEET
MCQ
AIPMT 2002
Choose the correct match.
Bladderwort, sundew, Venus flytrap
Bladderwort, sundew, Venus flytrap
A.
Nepenthes, Dionea, Drosera
B.
Nepenthes, Utricularia, Vanda
C.
Uricularia, Drosera, Dionea
D.
Dionea, Trapa, Vanda.
2001
NEET
MCQ
AIPMT 2001
Roots of which plant contains a red pigment which have affinity for oxygen?
A.
Carrot
B.
Soybean
C.
Mustard
D.
Radish
2001
NEET
MCQ
AIPMT 2001
Which aquatic fern performs nitrogen fixation?
A.
Azolla
B.
Nostoc
C.
Salvia
D.
Salvinia
2000
NEET
MCQ
AIPMT 2000
When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are
A.
yellowish leaves
B.
colourless petiole
C.
dark green leaves
D.
shoot apex die.
2000
NEET
MCQ
AIPMT 2000
Plants take zinc in the form of
A.
ZnSO4
B.
Zn++
C.
ZnO
D.
Zn.