Biology : Biomolecules

Purines possess nitrogen at

• 1, 2, 4 and 6 position

• 1, 3, 5 and 7 position

• 1, 3, 7 and 9 position

• 1, 2, 6 and 8 position

How many effective codons are there for the synthesis of twenty amino acids?

• 64

• 32

• 60

• 61

Glucose and amino acids are reabsorbed in the

• proximal tubule

• distal tubule

• collecting duct

• loop of Henle

Which one is imino acid?

• Pepsin

• Proline

• Cysteine

• Renin

The lactase hydrolyses lactose into

• glucose

• glucose and galactose

• fructose

• glucose and fructose

Example of a typical homopolysaccharide is

• lignin

• suberin

• inulin

• starch

Choose the correct non-protein amino acid

• hydroxyproline

• hydroxylysine

• cystine

• y-amino butyric acid

Inulin is a polymer of

• glucose

• galactose

• fructose

• arabinose

Mannitol is

• amino acid

• amino alcohol

• sugar alcohol

• sugar acid

Structural lipids of cell membrane are

• simple lipid

• chromolipids

• steroid

• phospholipids