When glucose is reacted with phenylhydrazine then osazone is formed. In this reaction how many phenyl hydrazine molecules are used?

1. 1

2. 2

3. 3

4. 4

Sucrose on treatement with conc. HCl produces:-

(1) Glucose

(2) Fructose

(3) Glucose + Fructose

(4) Maltose

Which type of amino acid is lysine ?

1. b - Amino acid

2. Acidic

3. Basic

4. Neutral

The above process in which a and b form remain in equilibrium with acyclic form and a change in optical rotation is observed which is called as–

(1) Mutarotation

(2) Epimerisation

(3) Condensation

(4) Inversion

At iso-electric point:

(a) conc. of cation is equal to conc of anion

(b) Net charge is zero.

(c) Maximum conc. of di-polar ion (Zwitterion) will be present

(d) All of the above

Which amino acid does not contain chiral centre ?
(1) Valine
(2) Leucine
(3) Glycine
(4) Iso-leucine

Which of the following pair gives same phenyl osazone ?

(a) D-Glucose and D-Allose
(b) D-Glucose and D-Alfrose
(c) D-Glucose and D-Mannose
(d) D-Glucose and D-Talose

Proteins mainly contain:

(1) C, H, O and N

(2) Only C and H

(3) C, H and O

(4) N and H

The main structural feature of protein is:

(1) The ester linkage

(2) The ether linkage

(3) The peptide linkage

(4) All of these

Keratin, a structural protein is present in:
(a) hair
(b) skin
(c) wool
(d) all of these