Vitamin-B₁₂ contains

• CO

• Fe

• Zn

• Ca

Blood sugar is

• fructose

• maltose

• haemoglobin

• glucose

Carbohydrates are stored in human body as

• glucose

• glycogen

• starch

• fructose

DNA contains the sugar

• Deoxyribose

• Ribose

• D-fructose

• D-glucose

Lactose sugar is formed from

• d-galactose

• d-glucose

• d-galactose and d-glucose

• d-glucose and d-fructose

The helical structure of proteins is stabilised by

• peptide bonds

• dipeptide bond

• hydrogen bond

• van der Waal's forces

Night blindness is caused due to the deficiency of

• B₁₂

• A

• C

• D

Proteins are hydrolysed by enzymes to give

• dihydroxy acids

• amino acids

• amines

• carboxylic acids

Number of peptide bonds in dipeptide is

• 2

• 1

• 3

• 4

RNA does not contain

• thymine

• adenine

• guanine

• uracil