Essential Biochemistry - Vitamins (Section 1)

1
Which type of reaction is catalyzed by biotin-dependent carboxylases?
Válasz
(C)
Carboxylation
2
Which is the active form of Vitamin D?
Válasz
(A)
25-hydroxycholecalciferol
3
What is the structure of Biotin?
Válasz
(B)
A bicyclic ring
4
What is the role of Vitamin D in bone?
Válasz
(A)
Increases calcium absorption
5
Where is Biotin found?
Válasz
A
B
D
6
The conversion of dUMP to dTMP requires which cofactor?
Válasz
(A)
Tetrahydrofolate (THF)
7
What is the term for the eye condition due to a deficiency of vitamin A?
Válasz
(D)
All the above
8
What is the main dietary source of Vitamin A?
Válasz
(D)
All of the above
9
Which of the following is the active form of niacin?
Válasz
(C)
NADP and NAD
10
Both folic acid and methylcobalamin are required in:
Válasz
(C)
Methylation of homocysteine to methionine
11
Biotin is involved in:
Válasz
A
B
C
D
12
What is the active form of Biotin?
Válasz
(A)
Enzyme bound biotin
13
Which of the following are water-soluble vitamins?
Válasz
A
C
14
What is the primary function of Vitamin B1?
Válasz
(B)
Coenzyme
15
What is the function of active Vitamin D?
Válasz
A
B
C
16
Which of the following is NOT a function of vitamin C?
Válasz
(D)
Blood clotting
17
What is the structure of Vitamin C?
Válasz
(D)
All of the above
18
Which of the following conditions are related to vitamin K deficiency?
Válasz
A
B
C
D
19
Which vitamin deficiency is associated with neurological disorders?
Válasz
(B)
Vitamin B12
20
What is the function of vitamin A in the eye?
Válasz
(A)
Vision
21
In the eye, retinal is involved in which part of the visual cycle?
Válasz
(B)
Isomerization of 11-cis-retinal to all-trans-retinal
22
Which of the following coenzymes is not derived from vitamins?
Válasz
(D)
Coenzyme Q
23
Which of the following is a carboxylation reaction that requires Biotin?
Válasz
(D)
All of the above
24
Which is the active form of vitamin A?
Válasz
(D)
All the above
25
Which of the following vitamin is required for collagen synthesis?
Válasz
(A)
Ascorbic acid
26
Which of the following is a symptom of Vitamin A deficiency?
Válasz
A
B
C
27
Which of the following is true regarding Vitamin A's function?
Válasz
A
B
C
D
28
Which enzyme requires FMN or FAD?
Válasz
(B)
Riboflavin dependent enzyme
29
What is the role of pantothenic acid?
Válasz
(A)
Coenzyme in fatty acid metabolism
30
The main features of rickets include:
Válasz
A
B
C
D
31
What is the role of retinol in the eye?
Válasz
(C)
Both A and B
32
What is the role of Folic Acid in the body?
Válasz
(D)
All of the above
33
Which of the following is used as an assay of riboflavin status?
Válasz
(B)
Glutathione reductase
34
What is the main dietary source of riboflavin?
Válasz
(B)
Dairy products
35
A deficiency of vitamin B12 causes:
Válasz
(C)
Pernicious anemia
36
Which of the following is a function of vitamin D?
Válasz
A
B
C
37
What is the role of vitamin C?
Válasz
A
B
C
38
What is the ring structure present in Biotin?
Válasz
(A)
Imidazole ring
39
What is the active form of riboflavin?
Válasz
(C)
FAD
40
What is the name of the ring structure fused to the imidazole ring in biotin?
Válasz
(B)
Thiophene
41
The active form of Vitamin C is also known as:
Válasz
(A)
Ascorbic acid
42
Which vitamin is known as vitamin B7?
Válasz
(B)
Biotin
43
What is the function of the enzyme thymidylate synthase?
Válasz
(A)
Converts dUMP to dTMP
44
How does Biotin aid in the conversion of Acetyl-CoA?
Válasz
(A)
Catalyzes the conversion to Malonyl-CoA
45
What is the role of Vitamin D in the body?
Válasz
(C)
Both A and B
46
Biotin is a coenzyme in which type of reactions?
Válasz
(B)
Carboxylation
47
Which of the following is NOT a source of Biotin?
Válasz
(D)
Grains
48
What is the therapeutic use of folic acid?
Válasz
(A)
To overcome the folate deficiency
49
Which disease is associated with niacin deficiency?
Válasz
(C)
Pellagra
50
Which enzyme catalyzes the conversion of deoxyuridylate (dUMP) to thymidylate (dTMP)?
Válasz
(A)
Thymidylate synthase