A linkage present in proteins and peptides is:

1.		2.
3.		4.

An optically inactive amino acid is-

The non-essential amino acid among the following is:

1. Anomers

2. Epimers

3. Enantiomers

4. Diastereoisomers

Insulin regulates the metabolism of : 

The human body does not produce : 

An insoluble biomolecule in water is-

Cellulose is a straight-chain polysaccharide composed of only :

1. D-glucose units joined by $\mathrm{\alpha }$ - glycosidic linkage.

2. D-glucose units joined by $\mathrm{\beta }$ - glycosidic linkage.

3. D-galactose units joined by $\mathrm{\alpha }$ - glycosidic linkage.

4. D-galactose units joined by $\mathrm{\beta }$ - glycosidic linkage.

In DNA, the complementary bases are:

1. Adenine and thymine; guanine and cytosine

2. Adenine and thymine; guanine and uracil

3. Adenine and guanine, thymine and cytosine

4. Uracil and adenine; cytosine and guanine