Question 1

Which of the following vitamins is NOT classified as a fat-soluble vitamin?

Accepted Answer

Vitamin C

Question 2

Vitamin A is essential for which of the following physiological functions?

Accepted Answer

Proper vision

Question 3

A severe deficiency in which vitamin can lead to rickets, a disease characterized by weak and brittle bones?

Accepted Answer

Vitamin D

Question 4

Which vitamin acts as an antioxidant, neutralizing highly reactive free radicals in the cell?

Accepted Answer

Vitamin E

Question 5

Which of the following is a direct precursor to Vitamin D synthesis in the human body?

Accepted Answer

Cholesterol

Question 6

Vitamin K is primarily involved in which physiological process?

Accepted Answer

Blood clotting

Question 7

Which of the following best describes the function of Vitamin D in the body?

Accepted Answer

Regulates calcium and phosphate metabolism

Question 8

Which vitamin is also known as tocopherol?

Accepted Answer

Vitamin E

Question 9

A patient presents with night blindness. Which vitamin deficiency is most likely responsible?

Accepted Answer

Vitamin A

Question 10

Which of the following vitamins is derived from the Danish word for 'coagulation'?

Accepted Answer

Vitamin K

Question 11

Which vitamin is a key component of the visual pigment rhodopsin?

Accepted Answer

Vitamin A

Question 12

A patient with a genetic defect in fat absorption is most likely to be deficient in which group of vitamins?

Accepted Answer

Vitamins A, D, E, and K

Question 13

Which vitamin is most directly involved in the prevention of oxidative damage to cell membranes?

Accepted Answer

Vitamin E

Question 14

Which of the following best describes the role of Vitamin K in the body?

Accepted Answer

Acts as a cofactor for enzymes involved in blood coagulation

Question 15

Which vitamin deficiency is most likely to result in impaired blood clotting and increased bleeding risk?

Accepted Answer

Vitamin K

Question 16

Which of the following is the correct chemical precursor for Vitamin A in the diet?

Accepted Answer

Beta-carotene

Question 17

Which vitamin is most directly involved in the regulation of gene expression related to calcium homeostasis?

Accepted Answer

Vitamin D

Question 18

Which of the following vitamins is most likely to accumulate to toxic levels if consumed in excess due to its fat solubility?

Accepted Answer

Vitamin A

Question 19

A patient is prescribed warfarin, a blood thinner. Which vitamin's function is most directly inhibited by this medication?

Accepted Answer

Vitamin K

Question 20

Which vitamin is required for the synthesis of proteins involved in the coagulation cascade?

Accepted Answer

Vitamin K

Lipid Vitamins: Structure, Function, and Clinical Relevance

Study Guide - Practice Questions