Chemistry : Biomolecules

Which one of the following is an ester ?

• Coconout oil

• Kerosene oil

• Soap

• Glycerine

Vitamin B₁₂ contains :

• Co

• Mn

• Mg

• Fe

A catalyst :

• lowers the activation energy

• change the rate constant

• change the product

• itself destroys in the reaction

The deficiency of iodine in diet causes :

• rickets

• nightblindness

• beri-beri

• goiter

In (+) glucose the number of chiral centres is :

• 4

• 6

• 0

• 5

Pick the wrong statements from the following.

• Deficiency of vitamin B6 (pyridoxume) results in convulsions.

• Sources of vitamin are yeast, milk, green vegetables and cereals.

• deficiency of vitamin D cause xerophthalmia

• Consumption of citrus fruits and green leafy vegetbles in food prevents scurvy.

Glucose is a/an:

• polyhydroxy ketone

• alcohol

• hydrate of carbon

• pentahydroxy aldehyde

Among the following, the monosaccharide is :

• cellulose

• starch

• fructose

• sucrose

Ribose is an example of:

• ketohexose

• disaccharide

• pentose

• polysaccharide

Proteins are :

• polypeptides with low molecular weights

• polypeptides with high molecular weights

• polymers of amides

• polymers of secondary amines