α-helix structure of proteins is stabilized by :

1.	H-bonds formed between the −SH and C=O group.
2.	H-bonds formed between the −NH and C=O group.
3.	Ionic bonds formed between the −SH and C=O group.
4.	Ionic bonds formed between the −NH and C=O group.

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.

Monosaccharides are:

Which of the following is not an essential amino acid : 

Reducing sugars are -

The structure that represents the peptide chain is:

1.
2.
3.
4.

$\alpha$-D-glucose and β-D-glucose are:

1. Epimers

2. Anomers

3. Functional isomers

4. Chain isomers

Glucose and Fructose can be distinguished by the use of :
1. Fehling solution 
2. Tollen's reagent 
3. Bromine water 
4. All of the above

The correct statements regarding "Denaturation" are:

1. (a), (b) and (c)
2. (b) and (c)
3. (a) and (c)
4. (a) and (b)