Question

Nitrogenous wastes are formed from the breakdown of

• A. Ammonia
• B. Fat
• C. Amino acids
• D. Water

Answer 1

The correct option is C

Amino acids

The correct option is (C):

Explanation of the correct option:

1. Nitrogenous wastes are formed from the metabolism of protein in the liver.
2. The proteins are metabolized or broken down to form amino acids which further break down to form the nitrogenous waste.
3. The nitrogenous wastes include, urea, uric acid, ammonia, etc.

Explanation of the incorrect options:

Option (A):

1. Ammonia is a type of nitrogenous waste.
2. The organisms excreting ammonia as their nitrogenous waste are known as ammonotelic organisms.
3. For example, fish.

Option (B):

1. Fat metabolism results in the synthesis of fatty acid and glycerol.
2. They are not associated with nitrogenous waste.

Option (D):

1. Water cannot be broken down to form nitrogenous waste.

Final answer:

Nitrogenous wastes are formed from the breakdown of amino acids.