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-

During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process

$\mathrm{Proteins} \stackrel{\mathrm{Enzyme} \left(\mathrm{a}\right)}{\to } \mathrm{Polypeptides} \stackrel{\mathrm{Enzyme} \left(\mathrm{B}\right)}{\to } \mathrm{Amino} \mathrm{acids},$

are respectively:
(a) amylase and maltase
(b) diastase and lipase
(c) pepsin and trypsin
(d) invertase and zymase

The human body does not produce

(1) DNA

(2) vitamins

(3) hormones

(4) enzymes