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

Mineral Nutrition Mock Exam-7

Question No:1

Active uptake of minerals by roots mainly depends on the

[A] availability of oxygen
[B] light
[C] temperature
[D] availability of carbon dioxide



Question No:2

Nitrogen is a component of

[A] Protein
[B] Chlorophyll
[C] Nucleic acid
[D] All



Question No:3

Which one of the following can fix atmospheric nitrogen directly?

[A] Pea
[B] Brassica
[C] Castor
[D] Petunia



Question No:4

Knot like bodies known as ‘nodules’ found in the roots of groundnut plant are produced by

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



Question No:5

Nitrogen fixation means

[A] N2 changes in NO3
[B] N2 changes in NH 3
[C] N 2 change into nitrates
[D] none



Question No:6

Nif genes occur in

[A] Rhizobium
[B] Aspergillus
[C] Penicillium
[D] Streptococcus



Question No:7

Which of the following pigments is essential for the nitrogen fixation by leguminous plants?

[A] Anthocyanin
[B] Phycocyanin
[C] Phycoerythrin
[D] Leghaemoglobin



Question No:8

Assertion: Biological nitrogen fixation is very high energy input process.
Reason: One molecule of ammonia formation require 8 ATP during biological nitrogen fixation.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false



Question No:9

Assertion: Leguminous plants are nitrogen fixers.
Reason: Leguminous plants have Rhizobium in their root nodules.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false



Question No:10

Assertion: Use of fertilizers greatly enhances crop productivity.
Reason: Irrigation is very important in increasing crop productivity.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false



Question No:11

Assertion: Hydroponics is used for solution culture.
Reason:A balanced nutrient solution contains both essential and nonessential elements.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false



Question No:12

Assertion: Nitrogen is very essential for sustenance of life.
Reason: Plant cannot use atmospheric nitrogen directly.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false



Question No:13

Assertion: The movement of ion is usually called flux.
Reason: The concentration of essential elements below which the plant growth is retarded is termed as critical concentration.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false



Question No:14

Assertion: Iron takes part in electron transport system of mitochondria.
Reason: Iron has no role in chlorophyll synthesis.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false



Question No:15

Assertion: Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification.
Reason: Nitrate present in the soil is also reduced to nitrogen by the process of denitrification.

[A] If both the assertion and the reason are true and the reason is a correct explanation of the assertion
[B] If both the assertion and reason are true but the reason is not a correct explanation of the assertion
[C] If the assertion is true bat the reason is false
[D] If both the assertion and reason are false