The enzyme responsible for biological nitrogen fixation is________________?

Related Mcqs:

1. Foliar application of nitrogen means applying nitrogen in solution form to___________________?

   A. Whole plant
   B. Leaves
   C. Stem only
   D. Flowers only

2. The substance that an enzyme acts upon is known as___________________?

   A. Product
   B. Substrate
   C. Mycotoxin
   D. None of the above

3. The transport of a substance across a biological membrane against a concentration gradient is called___________________?

   A. Passive transport
   B. Active transport
   C. Absorption
   D. Dissolution

4. Ratio of economic yield to biological yield expressed in percentage is called_______________?

   A. Harvest index
   B. Seed index
   C. Total yield
   D. Dry matter

5. Excess of nitrogen to plants causes_________________?

   A. Delay in ripening
   B. Delay in growth
   C. Delay in germination
   D. All the above

6. Azolla which fixes nitrogen in rice field is__________________?

   A. Bacteria
   B. Fungi
   C. Ferm
   D. None of the above

7. The available form of nitrogen for plants is_________________?

   A. NO₃
   B. NH₄
   C. Both a and b
   D. non of these

8. Preferable form of nitrogen for rice under submerged soil conditions is ____________?

   A. NH4
   B. NO3
   C. NO2
   D. All of these

   Submitted by: Muhammad Rehan

9. Gassypium hirsutum is________________?

   A. Tetraploid
   B. Diploid
   C. Triploid
   D. Hexaploid

10. Seed rate of cotton per acre is________________?

    A. 10-22 kg
    B. 5-6 kg
    C. 14-21 kg