Match the following concerning essential elements and their functions in plants:

Column I		Column II
(a)	Iron	(i)	Photolysis of water
(b)	Zinc	(ii)	Pollen germination
(c)	Boron	(iii)	Required for chlorophyll biosynthesis
(d)	Manganese	(iv)	IAA biosynthesis

Select the correct option:

	(a)	(b)	(c)	(d)
1.	(iv)	(iii)	(ii)	(i)
2.	(iii)	(iv)	(ii)	(i)
3.	(iv)	(i)	(ii)	(iii)
4.	(ii)	(i)	(iv)	(iii)

The product(s) of the reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are.

1. Nitrate alone

2. Ammonia and oxygen

3. Ammonia and hydrogen

4. Ammonia alone

In Glycine max, the product of biological nitrogen fixation is transported from the root nodules to other parts as:

1. Ammonia

2. Glutamate

3. Nitrates

4. Ureides

Which of the following elements helps in maintaining the structure of ribosomes?

1. Magnesium

2. Zinc

3. Copper

4. Molybdenum

Which of the following bacteria reduce nitrate in soil into nitrogen?

1. Nitrobacter

2. Thiobacillus

3. Nitrococcus

4. Nitrosomonas

For its action, nitrogenase requires:
1.  Light
2.  Mn²⁺
3.  Super oxygen radicals
4.  High input of energy

Study the cycle shown below and select the option which gives the correct words for all four blanks A, B, C, and D:

 Options:

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:
 

Which one of the following is essential for the photolysis of water?
1. Boron
2. Manganese
3. Zinc
4. Copper

Which one of the following is not an essential mineral element for plants while the remaining three are?
1. Phosphorus
2. Iron
3. Manganese
4. Cadmium