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Essential Biochemistry - Vitamins (Section 5)

1
Which vitamin is essential for transamination reactions?
Answer
(C)
Vitamin B6
2
Which vitamin is important for the formation of prothrombin?
Answer
(A)
Vitamin K
3
What is the active form of Pantothenic acid (Vitamin B5)?
Answer
(D)
Acetyl-CoA and CoA
4
Which of the following enzyme is used as a measure of thiamin deficiency?
Answer
(C)
Erythrocyte transketolase
5
What is the term for the condition caused by thiamine deficiency?
Answer
(C)
Beriberi
6
Vitamins are grouped based on their
Answer
(B)
Solubility
7
Which of the following is/are the functions of Vitamin B6?
Answer
A
B
C
D
8
What is the main function of FAD?
Answer
(B)
Act as an electron carrier
9
Which of the following is a role of NAD+?
Answer
(B)
Participates in oxidation-reduction reactions
10
What is the chemical name for Vitamin B1?
Answer
(B)
Thiamin
11
What is the active form of Riboflavin?
Answer
(A)
Flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD)
12
Excretion of FIGLU in urine occurs in deficiency of:
Answer
(B)
Folic acid
13
Deficiency of Vitamin A can lead to which of the following?
Answer
A
B
C
D
14
What is the active form of thiamine that participates in metabolic reactions?
Answer
(B)
Thiamine pyrophosphate
15
Increased prothrombin time is observed in the deficiency of:
Answer
(A)
Vitamin K
16
Thiamine (Vitamin B1) is required mainly for ________ metabolism.
Answer
(B)
Carbohydrate
17
Pyridoxal phosphate is a coenzyme for the reactions, except:
Answer
(D)
Oxidation-reduction
18
What is the role of Vitamin C in the body?
Answer
A
B
C
19
Both folic acid and methylcobalamin are required for:
Answer
(C)
Methylation of homocysteine to methionine
20
Which of the following are symptoms of Pellagra, a deficiency of Niacin?
Answer
A
B
C
21
Functionally active form of vitamin D is:
Answer
(A)
1,25-dihydroxycholecalciferol
22
Which vitamin is important in the metabolism of carbohydrates?
Answer
(B)
Vitamin B1
23
Niacin is a precursor for the synthesis of which coenzymes?
Answer
(B)
NAD and NADP
24
What is the primary source of Vitamin D?
Answer
(B)
Sunlight
25
The active form of vitamin B6 is
Answer
(B)
Pyridoxal phosphate (PLP)
26
Which of the following is/are the functions of Niacin?
Answer
A
C
27
Where is Riboflavin found abundantly?
Answer
(B)
Dairy products
28
Biotin is involved in:
Answer
(B)
Carboxylation
29
Which vitamin is necessary for the formation of coenzyme A (CoA)?
Answer
(C)
Vitamin B5
30
Which of the following is associated with the symptoms of Vitamin B12 deficiency?
Answer
(D)
All of the above
31
Which vitamins are water soluble?
Answer
(B)
Vitamin B1, Vitamin B2, Vitamin B3, Vitamin B5, Vitamin B6, Vitamin B7, Vitamin B9, Vitamin B12, Vitamin C
32
Rickets is due to deficiency of:
Answer
(A)
Vitamin D
33
Functions of vitamin D:
Answer
A
B
C
D
34
Which of the following is a common sign of riboflavin (vitamin B2) deficiency?
Answer
(B)
Cracks at the corners of the mouth
35
What is the primary function of PLP (pyridoxal phosphate)?
Answer
(A)
To facilitate transamination reactions
36
Which type of bond is important for Thiamin structure?
Answer
(D)
Methylene
37
Which vitamin aids in the synthesis of neurotransmitters and the formation of myelin?
Answer
(C)
B6
38
Which vitamin is a component of Coenzyme A?
Answer
(C)
Vitamin B5
39
Which of the following is a function of thiamine pyrophosphate (TPP)?
Answer
(C)
Participating in the metabolism of carbohydrates
40
Which of the following is a water-soluble vitamin?
Answer
(D)
Vitamin C
41
Which of the following is a rich dietary source of riboflavin?
Answer
(B)
Yogurt
42
Which of the following is a form of vitamin D?
Answer
(D)
All of the above
43
A deficiency of vitamin B₁₂ causes:
Answer
(C)
Pernicious anemia
44
Which ring structure is a component of the thiamine molecule?
Answer
(B)
Pyrimidine ring
45
The daily requirement of biotin is:
Answer
(C)
300-500 mcg
46
Beriberi is caused by a deficiency of:
Answer
(A)
Thiamine
47
Which vitamins are fat-soluble?
Answer
(B)
Vitamin A, Vitamin D, Vitamin E, Vitamin K
48
What is the coenzyme form of vitamin B2?
Answer
(A)
FAD and FMN
49
Which of the following is a precursor of Vitamin B9 (Folic acid)?
Answer
(D)
All of the above
50
Which of the following is NOT a symptom of a deficiency of Niacin?
Answer
(D)
Sore gums