The essential amino acid is/are-
1. Valine
2. Alanine
3. Serine
4. All of the above

The enzyme used for the above conversion is:
\(C_{12}H_{22}O_{11}\ \xrightarrow[H_2O]{?}\ \text{2 mole of glucose}\)

The secondary structure of protein is represented by:

α-helix structure of proteins is stabilized by :

Amino acids exhibit amphoteric behavior as -

1. They can act both as an acid and as a base.

2. They can act only as an acid but not as a base.

3. They can act only as a base but not an acid.

4. None of the above.

The denaturation of proteins indicates -