Biomolecules

Which of the following hormones contains iodine?

1. Testosterone
2. Adrenaline
3. Thyroxine
4. Insulin

In DNA, the complementary bases are

1. adenine and guanine; thymine and cytosine
2. uracil and adenine; cytosine and guanine
3. adenine and thymine; guanine and cytosine
4. adenine and thymine; guanine and uracil.

Which of the following is an amine hormone?

1. Insulin
2. Progesterone
3. Thyroxine
4. Oxypurine

RNA and DNA are chiral molecules, their chirality is due to

1. chiral bases
2. chiral phosphate ester units
3. D-sugar component
4. L-sugar component

Which of the following vitamins is water-soluble?

1. Vitamin E
2. Vitamin K
3. Vitamin A
4. Vitamin B

The human body does not produce

1. enzymes
2. DNA
3. vitamins
4. hormones

Which one of the following is a peptide hormone?

1. Adrenaline
2. Glucagon
3. Testosterone
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 Proteins enzyme (A) Polypeptide enzyme (B) Amino acids are respectively

1. invertase and zymase
2. amylase and maltase
3. diastase and lipase
4. pepsin and trypsin

Which functional group participates in disulphide bond formation in proteins?

1. Thioester
2. Thioether
3. Thiol
4. Thiolactone

The cell membranes are mainly composed of

1. fats
2. proteins
3. phospholipids
4. carbohydrates