Question No:1

Assertion: Rhizobium fix nitrogen hi symbiotic association with root nodules of leguminous plants only.
Reason: Biological nitrogen fixation is anaerobic process.

[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:2

Assertion: Nitrogen-fixing bacteria in legume root nodules survive in oxygen-depleted cells of nodules.
Reason: Leghaemoglobin completely removes oxygen from the nodule cells.

[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:3

Assertion: Deficiency of sulphur causes chlorosis in plants.
Reason: Sulphur is a constituent of chlorophyll, proteins and nucleic acids.

[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:4

Assertion: S and Ca are immobile.
Reason: S and Ga are part of the structural component of cell and hence not easily released.

[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:5

Assertion: Boron is required for uptake and utilization of calcium ion.
Reason: Boron is not required for carbohydrate translocation.

[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:6

Assertion: lorn is essential for formation of chlorophyll.
Reason: It activates catalase enzyme.

[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:7

Assertion: Calcium is a constituent of middle lamella.
Reason: Calcium is required in mitotic division.

[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:8

Assertion: Sulphur is present in two amino acids cysteine and methionine.
Reason: Vitamin (thiamine, biotin, coenzyme-A) and ferredoxin also contain sulphur.

[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

Leguminous plants are able to fix atmospheric 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 nitrogen catalyses the conversion of atmospheric N₂ to NH₃
[D] Nitrogenase is insensitive to oxygen



Question No:10

The genetically-modified (GM) brinjal in India has been developed for:

[A] Insect-resistance
[B] Enhancing self life
[C] Enhancing mineral content
[D] Drought-resistance



Question No:11

An element playing important role in nitrogen fixation is

[A] Molybdenum
[B] Copper
[C] Manganese
[D] Zinc



Question No:12

Which one of the following is not a micronutrient?

[A] Molybdenum
[B] Magnesium
[C] Zinc
[D] Boron



Question No:13

The free-living, anaerobic nitrogen-fixer is:

[A] Beijerinckia
[B] Rhodospirillum
[C] Rhizobium
[D] Azotobacter



Question No:14

The common nitrogen-fixer in paddy fields is:

[A] Rhizobium
[B] Azospirillum
[C] Oscillatoria
[D] Frankia



Question No:15

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

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1. Mineral Nutrition Mock Exam-7
2. Microbes in Human Welfare Mock Test-8
3. Mineral Nutrition Mock Exam-1
4. Mineral Nutrition Mock Exam-2
5. Mineral Nutrition Mock Exam-3

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