Free Mineral Nutrition (Daily Quiz: 10) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Which of the following statements about nitrogen fixation is correct ?

1. Nitrogenase is only catalytic under anaerobic conditions.
2. The energy for nitrogen fixation can be provided by either photosynthesis or respiration.
3. In nitrogen fixation, nitrogen is reduced by the addition of three successive pairs of hydrogen atoms.
4. Most nitrogen fixing microbes are aerobic.

(a) (ii) and (iv) only

(b) (i) and (ii) only

(c) (i), (ii) and (iii) only

(d) All of the above

Question-2

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 reason are true but the reason is not a correct explanation of the assertion.

(b) If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

(c) If the assertion is true but the reason is false.

(d) If both the assertion and reason are false.

Question-3

Enzyme first used for nitrogen fixation

(a) nitroreductase

(b) transferase

(c) nitrogenase

(d) transaminase.

Question-4

Match the column-I with column-II and choose the correct combination from the option given below.

Column -I	Column -II
A. Zinc	I. Chlorophyll
B. Sulphur	II. IAA
C. Magnesium	III. Nitrate reductase
D. Molybdenum	IV. Cysteine

Codes:

(a) A – III, B – IV, C – I, D – II

(b) A – I, B – II, C – III, D – IV

(c) A – III, B – I, C – II, D – IV

(d) A – II, B – IV, C – I, D – III

Question-5

Nitrogenase enzymes are extremely sensitive to _________molecules -

(a) Oxygen

(b) Water

(c) Hydrogen

(d) $CO_{2}$