Question

Which of the following molecules is not required for converting Glu to Pro?

a. ATP

b. ADP

c. glutamate kinase

d. glutamate dehydrogenase

e. pyrroline carboxylate reductase

Biosynthesis of which amino acid includes a non-enzymatic ring-closure reaction?

a. W (Tryptophan)

b. Y (Tyrosine)

c. Q (Glutamine)

d. A (Alanine)

e. P (Proline)

Which molecules are derived from amino acids?

a. Some neurotransmitters

b. the heme group

c. Glutathione

d. some cell wall constituents

e. All of the above

Answer 1

1) Which of the following molecules is not required for converting Glu to Pro?

Ans: d. glutamate dehydrogenase

The method istead involves glutamic- [\gamma] -semialdehyde dehydrogenase

2) Biosynthesis of which amino acid includes a non-enzymatic ring-closure reaction?

Ans: e. P (Proline)

Of the 5 amino acids given, alanine, glutamine do not have rings in their structure. Proline undergoes non enzymatic spontaneous ring closure to form substituted pyrrolidine moiety in its biosynthetic pathway.

3) Which molecules are derived from amino acids?

Ans: e. All of the above

Neurotransmitters often use glutamate, aspartate, cysteine and glycine amino acid precursors. Histidine residue is present in heme group. Glutamic acid, cysteine and glycine are required for glutathione synthesis. While cell wall components such as peptidoglycan are derived from amino acid derived.