Adenosine is an example of:

(1) nucleotide

(2) nucleoside

(3) purine base

(4) pyrimidine base

The incorrect statement among the following is:

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?

1. Thyroxin               

2. Insulin

3. Adrenaline             

4. 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 ?

1. (+) Sucrose

2. (+) Lactose

3. (+)Maltose

4. (-)Fructose

Hormone that contains iodine is :

1. Insulin

2. Testosterone

3. Adrenaline

4. Thyroxine

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

$\mathrm{Proteins}<mspace\; width="1em"></mspace>\stackrel{\mathrm{Enzyme}<mspace\; width="1em"></mspace>\left(\mathrm{a}\right)}{\to }<mspace\; width="1em"></mspace>\mathrm{Polypeptides}<mspace\; width="1em"></mspace>\stackrel{\mathrm{Enzyme}<mspace\; width="1em"></mspace>\left(\mathrm{B}\right)}{\to }<mspace\; width="1em"></mspace>\mathrm{Amino}<mspace\; width="1em"></mspace>\mathrm{acids},$

are respectively:
(1) amylase and maltase
(2) diastase and lipase
(3) pepsin and trypsin
(4) invertase and zymase

Which one of the following vitamins contains a metal atom?

1. Riboflavin

2. Vitamin B₁₂

3. Vitamin A

4. Vitamin B₆