White blood cells act ______.

A. As source of energy

B. For blood clotting

C. As defence against infection

D. As a medium for oxygen transport from lungs to tissues

The unused fat present in the body is?

A. Converted into carbohydrates

B. Removed as waste from the body

C. Reconverted into animal fat and stored in different parts of the body

D. Easily destroyed by certain enzymes present in the body

Fat is a?

A. Lipid

B. Protein

C. Amino Acid

D. Ether

Pepsin converts:

A. Protein into peptides in acid media

B. Protein into peptides in alkaline media

C. Protein into peptides in neutral media

D. Starch into glucose