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Essential Biochemistry - Vitamins (Section 2)

1
Which of the following is the precursor for synthesis of tetrahydrofolate (THF)?
Answer
(A)
Folic acid
2
Which enzyme uses Biotin as a cofactor?
Answer
(B)
Pyruvate carboxylase
3
Which of the following is a key function of vitamin D?
Answer
(A)
Regulating calcium and phosphorus levels
4
Which of the following is synthesized with the help of Vitamin C?
Answer
(A)
Collagen
5
What is the active form of vitamin B1?
Answer
(B)
Thiamine pyrophosphate
6
Which of the following is the active form of vitamin B6?
Answer
(D)
Pyridoxal phosphate
7
All of the following vitamins have antioxidant property, except:
Answer
(D)
Cholecalciferol
8
Which compound is synthesized with the help of vitamin C?
Answer
(A)
Collagen
9
Where is thiamine (vitamin B1) absorbed primarily?
Answer
(B)
Duodenum
10
Which form of Vitamin A is transported in the blood?
Answer
(A)
Retinol
11
Which vitamin is an antioxidant?
Answer
(C)
Vitamin C
12
What is the role of Vitamin D in the intestine?
Answer
(A)
Increases calcium absorption
13
Which food is a good source of pantothenic acid (vitamin B5)?
Answer
(A)
Eggs
14
Precursor of CoA is:
Answer
(D)
Pantothenic acid
15
What is the role of THF in folate metabolism?
Answer
(A)
Donates methyl groups
16
Which of the following is a symptom of thiamine deficiency?
Answer
(C)
Peripheral neuritis
17
Which part of the eye is affected by Vitamin A deficiency?
Answer
(B)
Retina
18
Which of the following is required for the conversion of propionyl CoA to methylmalonyl CoA?
Answer
A
B
19
Which of the following vitamins would most likely become deficient in a person who developed a completely vegetarian lifestyle?
Answer
(C)
Cobalamin
20
What is the first hydroxylation step in vitamin D activation?
Answer
(A)
25-hydroxylation
21
What is the active form of Folic Acid?
Answer
(C)
Tetrahydrofolate
22
What is the main function of Vitamin D?
Answer
(A)
Regulate calcium and phosphorus metabolism
23
In the context of vitamin A, what is 'retinal'?
Answer
(B)
The aldehyde form
24
Which form of vitamin A is involved in vision?
Answer
(B)
Retinal
25
What are the sources of Vitamin D?
Answer
A
B
C
26
Functionally active form of vitamin D is:
Answer
(A)
1,25-dihydroxycholecalciferol
27
What is the source of Vitamin D3 (cholecalciferol)?
Answer
(A)
Animal sources and sun exposure
28
How much Biotin is the recommended daily dose for adults?
Answer
(C)
50 μg
29
In what form is Vitamin B12 stored in the liver?
Answer
(D)
Hydroxocobalamin
30
What is the main role of Riboflavin (Vitamin B2)?
Answer
(A)
Coenzyme
31
Which of the following enzyme is used as a measure of thiamin deficiency?
Answer
(B)
Transketolase
32
Pellagra occurs due to deficiency of:
Answer
(B)
Niacin
33
Where does the activation of Vitamin D occur?
Answer
(A)
Kidney and Liver
34
What is the name of the enzyme that converts propionyl-CoA to methylmalonyl-CoA?
Answer
(B)
Propionyl-CoA carboxylase
35
Antihemorrhagic vitamin is:
Answer
(C)
Vitamin K
36
Which of the following is a symptom of Vitamin A deficiency?
Answer
(A)
Night blindness
37
Which of the following is NOT a potential consequence of a vitamin D deficiency?
Answer
(C)
Increased bone density
38
What is the role of Vitamin C (ascorbic acid) in collagen synthesis?
Answer
(A)
Hydroxylation of proline and lysine residues
39
Excretion of FIGLU in urine occurs in deficiency of:
Answer
(B)
Folic acid
40
Which of the following is a function of vitamin B6?
Answer
A
B
41
Which form of niacin is used to treat high cholesterol?
Answer
(B)
Nicotinic Acid
42
What is a symptom of vitamin C deficiency?
Answer
A
B
C
D
43
Which of the following is a function of Vitamin A?
Answer
(D)
All of the above
44
What is the cause of cheilosis?
Answer
(C)
Riboflavin deficiency
45
Which enzyme facilitates the first hydroxylation step in Vitamin D activation?
Answer
(A)
25-hydroxylase
46
What is the name of the disease that occurs due to a thiamine deficiency?
Answer
(B)
Beriberi
47
How much vitamin C is recommended daily?
Answer
(C)
60-80 mg
48
What is the role of Vitamin C in wound healing?
Answer
(A)
Collagen synthesis
49
What is the source of Biotin?
Answer
(C)
Liver
50
What is a major function of Vitamin D?
Answer
(A)
Calcium absorption