Question

1.ATP in nitrogen fixation:

a. Is provided by the host plant

b. Directly drives the oxidation of Ferredoxin and reduction of Dinitrogenase reductase

c. Is required because flow of electrons from ferredoxin to nitrogenase is kinetically unfavorable

d. Both a and c

e. None of the above

2. Essential amino acids

a. Are not made at all or made to sufficient levels in our bodies

b. Must be obtained by animals by eating other organisms

c. include amino acids such as glutamate and glutamine

d. both a and b

e. all of the above

3. Formation of which amino acid represents the most common point for incorporation for NH4+ into metabolism?

a.   Asp

b.   Cys

c.   Ser

d.   Gly

e.   Glu

Answer 1

Biochemistry

multiple choice

1. ATP in nitrogen fixation:

d. Both a and c

The process of reduction of nitrogenase by ferredoxin electron transfer is favoured. The ferredoxin in its reduced form is formed by various processes such as photosynthesis, respiration, etc.

2. Essential amino acids

a. Are not made at all or made to sufficient levels in our bodies

b. Must be obtained by animals by eating other organisms

c. include amino acids such as glutamate and glutamine

d. both a and b

Essential amino acids are not synthesized in the body. It is obtained by mean of consuption of food. There are a total of nine amino acids in this category.

3. Formation of which amino acid represents the most common point for incorporation for NH4+ into metabolism?

e.   Glu

The alpha-ketoglutarate forms glutamate by insertion of NH4+ into the system, which is the most common point in metabolism showing involvement of NH4+ ion.