The structural feature which distinguishes proline from other natural $\alpha$-amino acids is -

1. It is optically inactive.

2. It contains an aromatic group.

3. It is a dicarboxylic acid.

4. It is a secondary amine.

If $\mathrm{\alpha }$—D—glucose is dissolved in water and kept for a few hours, the major constituent(s) present in the solution is/are:

The compound that does not reduce Benedict's solution is: 

A hormone that contains iodine is:

The incorrect statement about carbohydrates is : 

1. Maltose is a reducing sugar.

2. They are stored in the animal body as glycogen.

3. Amylopectin constitutes about 15-20% Of starch.

4. Cellulose is composed of only $\mathrm{\beta }$-D- glucose units.

Cellulose upon acetylation with excess acetic anhydride/H₂SO₄ (catalytic) gives cellulose triacetate whose structure is:

1.
2.
3.
4.

1. Anomers

2. Epimers

3. Enantiomers

4. Diastereoisomers

Scurvy is caused due to the deficiency of vitamin:-

An acid that acts as a vitamin is

The non-essential amino acid among the following is: