Blood plasma cells form 55-60% by volume of blood. Antibodies and some other substances such as lysozyme and properdin always occur in the plasma. They serve to destroy bacteria, viruses and toxic substances that may enter into the blood from outside or from body tissues.

Correct Option: C

Blood plasma cells form 55-60% by volume of blood. Antibodies and some other substances such as lysozyme and properdin always occur in the plasma. They serve to destroy bacteria, viruses and toxic substances that may enter into the blood from outside or from body tissues.

Enzymes are proteinaceous substances which are capable of catalysing chemical reactions of biological origins without themselves undergoing any change. The term enzyme was used by Willy Kuhne in 1878.

Correct Option: B

Enzymes are proteinaceous substances which are capable of catalysing chemical reactions of biological origins without themselves undergoing any change. The term enzyme was used by Willy Kuhne in 1878.

Liver cells secrete bile, biles help in emulsification of fat i.e. breaking down of fats into small micelles.

Correct Option: B

Liver cells secrete bile, biles help in emulsification of fat i.e. breaking down of fats into small micelles.

Enzymes are biological catalysts that increases the rate of reaction without altering its structure.

Correct Option: D

Enzymes are biological catalysts that increases the rate of reaction without altering its structure.

Sodium, chloride and potassium ions are essential for the transmission of nerve impulses.

Correct Option: C

Sodium, chloride and potassium ions are essential for the transmission of nerve impulses.