Biomolecules

The cell membranes are mainly composed of

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

A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?

1. Three
2. Four
3. One
4. Two

The hormone that helps in the conversion of glucose to glycogen is

1. cortisone
2. bile acids
3. adrenaline
4. insulin

The correct statement in respect of protein haemoglobin is that it

1. functions as a catalyst for biological reactions
2. maintains blood sugar level
3. acts as an oxygen carrier in the blood
4. forms antibodies and offers resistance to diseases.

Number of chiral carbons in -D-(+)-glucose is

1. five
2. six
3. three
4. four

The helical structure of protein is stabilised by

1. dipeptide bonds
2. hydrogen bonds
3. ether bonds
4. peptide bonds

Which of the following structures represents the peptide chain?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called

1. maltase
2. lipase
3. zymase
4. pepsin

Glycolysis is

1. oxidation of glucose to glutamate
2. conversion of pyruvate to citrate
3. oxidation of glucose to pyruvate
4. conversion of glucose to haem

Phospholipids are esters of glycerol with

1. three carboxylic acid residues
2. two carboxylic acid residues and one phosphate group
3. one carboxylic acid residue and two phosphate groups
4. three phosphate groups