Which one of the following compounds will form an osazone derivative ?

1. CH₃CH₂COCH₂OH

2. CH₃COCH₂CH₂OH

3. CH₃CH₂CHOHCH₂OH

4. CH₃CH₂COCH₂OCH₃

The configuration of the chirality centers in D-threose (shown) are:

(1) 2R, 3R

(2) 2R, 3S

(3) 2S, 3R

(4) 2S, 3S 

Which of the following Fischer projection formula is same as D-Glyceraldehyde ?

(1) 

(2) 

(3) 

(4) 

Which reagent/s can be used to distinguish glucose and fructose?

(I) Bromine water (II) furfural test (III) Schiff’s reagent

1. (I), (II) and (III)

2. (II) and (III)

3. (I)  & (II)

4. Only (Ill)

Proteins mainly contain:

(1) C, H, O and N

(2) only C and H

(3) C, H and O

(4) N and H

In the human body, enzymes hydrolyse protein into:

1. a ketonic acid-like CH₃COCOOH

2. a hydroxy acid like CH₃CHOHCOOH

3. dicarboxylic acid-like HOOC—COOH

4. amino acid-like CH₂NH₂COOH

Which statement about protein is wrong?

(1) Proteins occur in all living cells

(2) Proteins invariably contain N, O, C and H

(3) Proteins are synthesized by plant kingdom only

(4) Proteins are also synthesized in laboratory

The main structural feature(s) of protein is/are:

1. The ester linkage

2. The ether linkage

3. The peptide linkage

4. All of these

Proteins give ?

(1) a violet colour with alkaline CuSO₄ solution

(2) form a purple colour on boiling with dilute ninhydrin solution

(3) yellow colour on boiling with HNO₃

(4) all of the above

Which of the following is proteolytic enzyme?

(1) Insulin

(2) Diastase

(3) Pepsin

(4) Adenine