The function of DNA is:

(1) To synthesize RNA

(2) To synthesize the necessary proteins

(3) To carry the hereditary characteristics from generation to generation

(4) all are correct

Which one of the following vitamins contains a metal atom?
(a) Riboflavin
(b) Vitamin B₁₂
(c) Vitamin A
(d) Vitamin B₆

Adenosine is an example of:

(1) Nucleotide

(2) Nucleoside

(3) Purine base

(4) Pyrimidine base

Which of the following statements is not correct?
(a) Insulin maintains sugar level in the blood of a human body
(b) Ovalbumin is a simple food reserve in egg white
(c) Blood proteins thrombin and fibrinogen are involved in blood clotting
(d) Denaturation makes the proteins more active

In a protein molecule, various amino acids are linked together by

(1) b-glycosidic bond

(2) Peptide bond

(3) Dative bond

(4) a-glycosidic bond

Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings?

(a) Thyroxin                (b) Insulin

(c) Adrenaline             (d) Estradiol

Deficiency of vitamin B₁ causes the disease

(1) Convulsions

(2) Beri-beri

(3) Cheilosis

(4) Sterility

Which one of the following sets of monosaccharides forms sucrose?
(1) a-D-galactopyranose and
     a-D-glucopyranose
(2) α-D-glucopyranose and
     b-D-fructofuranose
(3) b-D -glucopyranose and
     a-D fructofuranose
(4) α-D-glucopyranose and
     b-D-fructopyranose

Which one of the following does not exhibit the phenomenon of mutarotation ?

(a) (+) Sucrose

(b) (+) Lactose

(c) (+)Maltose

(d) (-)Fructose

A hormone that contains iodine is-