NCERT mineral nutrition NEET sample,mock,model,grand test papers,mcq

Mineral Nutrition Mock Exam-9

Question No:1

The function of leghaemoglobin in the root nodules of legumes is:

[A] Oxygen removal
[B] Nodule differentiation
[C] Expression of nif gene
[D] Inhibition of nitrogenase activity



Question No:2

Nitrifying bacteria

[A] Convert free nitrogen to nitrogen compounds
[B] Convert proteins into ammonia
[C] Reduce nitrates to free nitrogen
[D] Oxidize ammonia to nitrates



Question No:3

Which one of the following elements in plants is not remobilised?

[A] Calcium
[B] Potassium
[C] Sulphur
[D] Phosphorus



Question No:4

An organism used as a bio fertilizer for raising soyabean crop is:

[A] Azospirillum
[B] Rhizobium
[C] Nostoc
[D] Azotobacter



Question No:5

For its action, nitrogenase requires:

[A] Light
[B] Mn2+
[C] Super oxygen radicals
[D] High input of energy



Question No:6

For its activity, carboxypeptidases requires:

[A] Iron
[B] Niacin
[C] Copper
[D] Zinc



Question No:7

Read the following four statements (A-D):
(A) Both, photo phosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane
(B) In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth
(C) Stamens in flowers of Gloriosa and Petunia are polyandrous
(D) Symbiotic nitrogen-fixers occur in free- living state also in soil
How many of the above statements are right

[A] Three
[B] Four
[C] One
[D] Two



Question No:8

Best defined function of Manganese in green plants is:

[A] Photolysis of water
[B] Calvin cycle
[C] Nitrogen fixation
[D] Water absorption



Question No:9

Which one of the following is wrong statement?

[A] Anabaena and Nostoc are capable of fixing nitrogen in free-living state also.
[B] Root nodule forming nitrogen fixers live as aerobes under free-living conditions.
[C] Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
[D] Nitrosomonas and Nitrobacter are chemoautotrophs



Question No:10

The most abundant intracellular cation is:

[A] Na+
[B] Ca+
[C] FT
[D] +



Question No:11

The first stable product of fixation of atmospheric nitrogen in leguminous plants is:

[A] NO 2
[B] Ammonia
[C] NO – 3
[D] Glutamate



Question No:12

Deficiency symptoms of nitrogen and potassium are visible first in:

[A] Senescent leaves
[B] Young leaves
[C] Roots
[D] Buds



Question No:13

A few normal seedlings of tomato were kept in a darkroom. After a few days they were found to have become white coloured like albinos. Which of the following terms will you use to describe them?

[A] Mutated
[B] Embolised
[C] Etiolated
[D] Defoliated



Question No:14

Mineral known to be required in large amounts for plant growth include:

[A] Phosphorus, potassium, sulphur, calcium
[B] Calcium, magnesium, manganese, copper
[C] Potassium, phosphorus, selenium, boron
[D] Magnesium, sulphur, iron, zinc



Question No:15

Which one gives the most valid and recent explanation for stomatal movements?

[A] Transpiration
[B] Potassium influx and efflux
[C] Starch hydrolysis
[D] Guard cell photosynthesis



Question No:16

The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

[A] Manganese and Potassium
[B] Magnesium and Molybdenum
[C] Magnesium and Chlorine
[D] Manganese and Chlorine



Question No:17

During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:

[A] Xanthophyll
[B] Carotene
[C] Cytochrome
[D] Laghaernoglobin