Essential Biochemistry - Vitamins (Section 3)
1
What is the role of vitamin A in vision?
2
Where is folic acid found?
3
What is the RDI for niacin?
4
What is the deficiency disease associated with Vitamin B6?
5
What is the primary function of vitamin D?
6
The metabolic process that is most directly affected by Vitamin A is:
7
What are the forms of Vitamin B6?
8
Pyridoxal phosphate is a coenzyme for the reactions, except:
9
What is a result of Vitamin A deficiency?
10
Which of the following is NOT a function of Vitamin A?
11
In the eye, retinal is involved in:
12
Biotin is synthesized by:
پاسخ دهید(A)
Microorganisms in the intestine
13
Which of the following is a function of Vitamin C?
14
What enzyme is responsible for the conversion of acetyl-CoA to malonyl-CoA?
16
Which vitamin is a precursor for coenzyme A?
17
Which is NOT a function of Vitamin C?
پاسخ دهید(C)
Production of thromboxane
18
Increased prothrombin time is observed in the deficiency of:
19
Where is biotin primarily absorbed?
20
Biotin is essential for the carboxylation of which of the following?
21
Beriberi is caused by a deficiency of:
22
Which enzyme is responsible for the conversion of thiamine to thiamine pyrophosphate?
پاسخ دهید(C)
Thiamine pyrophosphokinase
23
What is the DRI for vitamin B6?
24
Which enzyme uses biotin as a co-factor in the conversion of pyruvate to oxaloacetate?
25
Which of the following is not derived from plant?
26
Which form of Vitamin D is produced in the skin upon exposure to sunlight?
27
Which form of folic acid is active?
28
Which vitamin enhances iron absorption?
29
Thiamine pyrophosphate is required for the following enzymatic activity:
30
What is the RDA of Biotin for adults?
31
What reaction does the enzyme Thymidylate synthase catalyze?
32
Which vitamin can be destroyed by the use of diuretics?
33
Rickets is due to deficiency of:
34
The active form of Vitamin D is also known as:
35
How is Vitamin A transported in the blood?
پاسخ دهید(A)
Bound to retinol-binding protein
36
What is the primary function of niacin (Vitamin B3)?
پاسخ دهید(C)
Coenzyme in redox reactions
38
Which of the following are required for the synthesis of methionine from homocysteine?
39
What is the role of folic acid during pregnancy?
پاسخ دهید(A)
Prevention of neural tube defects
40
What reaction does the enzyme thymidylate synthase catalyze?
پاسخ دهید(A)
Conversion of deoxyuridylate (dUMP) to thymidylate (dTMP)
41
What is the immediate precursor to the active form of vitamin D in the kidney?
پاسخ دهید(C)
25-hydroxycholecalciferol
42
What compound is formed by the carboxylation of acetyl-CoA?
43
Which of the following are sources of vitamin E?
44
Which enzyme activates Vitamin D in the kidney?
45
The deficiency of which vitamin leads to scurvy?
46
What is the main dietary source of Vitamin C?
47
Both Wernicke's disease and beriberi can be treated by administering vitamin:
49
Which of the following is a characteristic symptom of infantile beriberi?
50
What is the RDA for Vitamin B5 (Pantothenic acid)?
