Which amino acid does not contain a chiral center?

1. Valine

2. Leucine

3. Glycine

4. Iso-leucine

Which of the following pair gives same phenyl osazone ?

(1) D-Glucose and D-Allose

(2) D-Glucose and D-Alfrose

(3) D-Glucose and D-Mannose

(4) D-Glucose and D-Talose

Among the three compounds shown below, two yield the same product on reaction with warm HNO₃. The exception is:-

(1)

(2)

(3)

(4) None of these

For the complex conversion of D-glucose into the corresponding osazone, the minimum number of equivalents of phenyl hydrazine required is :

(1) two

(2) three

(3) four

(4) five

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