Which of the following is a vitamin?

(A) Ascorbic acid
(B) Acetic acid
(C) Tartaric acid
(D) None of these

The answer is: (A) Ascorbic acid
Ascorbic acid (Vitamin C) is commonly found in citrus fruits and vegetables. Vitamin C also functions as an antioxidant.

Enzyme can only function when it attains

(A) Tertiary structure
(B) Quaternary structure
(C) Secondary structure
(D) Primary structure

The answer is: (A) Tertiary structure
Enzyme can only function when it attains Tertiary structure.

Which papillae have the most taste buds?

(A) Foliate
(B) Filiform
(C) Fungiform
(D) Circumvallate

The answer is: (D) Circumvallate
There are three types of papillae: fungiform (contain 25% of the total number of taste buds), circumvallate (50% of the taste buds), and foliate (25% of the taste buds).

Vitamin K is needed for ________ in the body.

(A) epithelial tissue maintenance
(B) antioxidant
(C) blood clotting
(D) none of these

The answer is: (C) blood clotting
Vitamin K is a type of vitamin that is needed for blood clotting in human body.