Lecture 2 Biochemistry

• 1- Vitamin synthesized by bacterial in the intestine is:

• A
• C
• D
• K

• 2- An important function of vitamin A is:

• (A)To act as coenzyme for a few enzymes
• (B)To play an integral role in protein synthesis
• (C)To prevent hemorrhages
• (D)To maintain the integrity of epithelial tissue

3- Hydroxylation of 25-OH vitamin D3 at “c25 “takes place in:

• •(A) Liver
• (B) Kidneys
• •(C) Intestine
• (D) Pancreas

•4- Anti xerophthalmic vitamin is:

• (A) Vitamin B1
• (B) Vitamin B2
• •(C) Vitamin B6
• (D) Vitamin A

• 5-Hydroxylation of vitamin D occurs in:

• • (A) Skin
• (B) Liver and kidney
• • (C) Brain
• (D) Intestinal mucosa

• 6.Continuous bleeding from an injured part of body is due to deficiency of

• Vit A
• Vit B
• Vit E
• Vit K

• 7- Bow legs and knock-knees can occur in:

• •(A) Rickets
• (B) Osteomalacia
• •(C) Both A and B
• (D) Hypervitaminosis D

• 8- Prothrombin time is prolonged in:

• • (A) Vitamin K deficiency
• (B) Liver damage
• • (C) Both (A) and (B)
• (D) None of these

• 9-A steroid vitamin is :

• A) vitamin D
• B) vitamin A
• C) niacin
• D) vitamin B6

• 10-Which one of the following pairs is not correctly matched ?

• • A)Vitamin C and scurvy
• • B)Vitamin A and night blindness
• • C)Vitamin B6 and anemia
• • D)Vitamin B2 and pellagra