Enzyme first used for nitrogen fixation:
1.  Nitrogenase
2.  Nitroreductase
3.  Transferase
4.  Transaminase

Cytochrome is:
1.  Metallo flavo protein
2.  Fe containing porphyrin pigment
3.  Glycoprotein
4.  Lipid

Roots of which plant contains a pink pigment that has an affinity for oxygen:
1.  Carrot
2.  Soyabean
3.  Mustard
4.  Radish

The major role of minor elements inside living organisms is to act as:
1. Co-factors of enzymes
2. Building blocks of important amino acids
3. Constituent of hormones
4. Binder of cell structure

If by radiation all nitrogenase enzymes are inactivated, then there will be no:
1. Fixation of atmospheric nitrogen
2. Conversion from nitrate to nitrite in legumes
3. Conversion from ammonium to nitrate in soil
4. Fixation of nitrogen in legumes

The deficiencies of micronutrients, not only affect the growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport:

1. Ca, K, Na

2. Co, Ni, Mo

3. Mn, Co, Ca

4. Cu, Mn, Fe

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

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

Plants can be grown in

1.  soil with essential nutrients.

2.  water with essential nutrients.

3.  either water or soil with essential nutrients.

4.  water or soil without essential nutrients.

Match the element with its associated functions/roles and choose the correct option among given below:

Codes

1.  1, 2, 3, 4, 5

2.  4, 1, 3, 2, 5

3.  3, 2, 4, 5, 1

4.  2, 3, 5, 1, 4