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Quick Biochemistry - Vitamins (Section 3)

1
What is the cause of subacute combined degeneration of the spinal cord due to a lack of?
Answer
(B)
Cobalamin
2
Which vitamin is essential for the process of metabolizing diols, such as the conversion of ethylene glycol?
Answer
(B)
Cobalamin
3
Both folic acid and methyl cobalamin (vitamin B₁₂) are necessary for which of the following biochemical reactions?
Answer
(D)
Methylation of homocystein to methionine
4
What are the components of folic acid or folate?
Answer
(C)
Base pteridine, p-amino benzoic acid and glutamate
5
As a coenzyme, folate plays a role in the transfer and use of what type of molecule?
Answer
(C)
Single carbon moiety
6
How is folic acid deficiency often identified through the body?
Answer
(B)
Figlu
7
Sulfa drugs interrupt the production of what substance in bacteria?
Answer
(C)
Tetrahydrofolate
8
Which type of anemia is associated with folate deficiency?
Answer
(D)
Megaloblastic anemia
9
In which environment is thiamin most stable when exposed to heat?
Answer
(A)
Acidic medium
10
What conditions are associated with thiamin deficiency?
Answer
(D)
All of these
11
Which process necessitates thiamin diphosphate as a component?
Answer
(A)
a-Keto acids oxidative decarboxylation
12
What dietary practice can help minimize the loss of thiamin?
Answer
(D)
All of the above
13
The recommended daily intake of thiamin is approximately:
Answer
(B)
0.5 mg per 1,000 Calories
14
In which group is the demand for thiamin typically higher?
Answer
(D)
Both those with alcohol dependency and pregnant women
15
What health condition is most likely to affect individuals whose primary food source is processed rice?
Answer
(A)
Beriberi
16
In which environment is riboflavin resistant to heat degradation?
Answer
(D)
Both acidic and neutral conditions
17
Which of the following enzymes utilizes FAD as a coenzyme?
Answer
(D)
All of these
18
Which of the following conditions can be attributed to a lack of riboflavin?
Answer
(C)
Angular stomatitis
19
What nutrient helps to prevent pellagra?
Answer
(C)
Niacin
20
Niacin's molecular structure features a:
Answer
(B)
Carboxyl functional group
21
Which metabolic process necessitates NADP as a coenzyme?
Answer
(C)
Pentose phosphate pathway
22
In which process is NAD essential as a coenzyme?
Answer
(A)
Malate conversion
23
In which metabolic pathway/s is NAD utilized as a coenzyme?
Answer
(D)
Both Krebs cycle and fatty acid breakdown
24
From which precursor can niacin be produced within the human body?
Answer
(D)
Tryptophan
25
What is the recommended daily intake of niacin?
Answer
(C)
20 mg
26
Which dietary habit is most frequently associated with niacin deficiency?
Answer
(C)
Consumption of maize and/or sorghum
27
In individuals with pellagra, where is dermatitis typically observed?
Answer
(A)
Areas exposed to sunlight
28
Which condition can lead to niacin deficiency?
Answer
(A)
Hartnup disease
29
Which amino acid is found in pantothenic acid?
Answer
(C)
B-Alanine
30
Which component provides the sulphydryl group in coenzyme A?
Answer
(D)
Thioethanolamine
31
What type of base is found in Coenzyme A?
Answer
(A)
Adenine
32
Which of the following is essential for the creation of coenzyme A?
Answer
(A)
ATP
33
Coenzyme A plays a role in breaking down which of these?
Answer
(D)
All of these
34
A lack of pantothenic acid can impact which of the following in humans?
Answer
(C)
Both (A) and (B)
35
Which enzyme uses Pyridoxal phosphate as a coenzyme?
Answer
(D)
All of these
36
In which process is Pyridoxal phosphate needed as a coenzyme?
Answer
(D)
All of these
37
Pyridoxal phosphate is a necessary coenzyme for which enzyme?
Answer
(B)
Phosphorylase
38
How can a lack of Pyridoxine be identified by examining urine?
Answer
(C)
Xanthurenic acid
39
What substance is given to help diagnose Pyridoxine deficiency by measuring xanthurenic acid in urine?
Answer
(C)
Tryptophan
40
The amount of Pyridoxine needed depends on how much of which substance is consumed?
Answer
(B)
Proteins
41
Which of the following is known to counteract the effects of egg white consumption?
Answer
(B)
Biton
42
What happens to avidin and biotin when eggs undergo heat treatment?
Answer
(B)
Avidin is inactivated but biotin remains unaffected
43
Which type of enzyme utilizes biotin as a necessary component?
Answer
(D)
Carboxylases
44
Biotin plays a crucial role in the function of which enzyme(s)?
Answer
(D)
All of these
45
Which of the following enzymes requires lipoic acid as a coenzyme?
Answer
(C)
Both (A) and (B)
46
In terms of its chemical composition, what is lipoic acid classified as?
Answer
(D)
Sulphur containing fatty acid
47
What are the key components of the molecule known as folic acid?
Answer
(D)
All of these
48
What molecule is essential for the transformation of folate into tetrahydrofolate?
Answer
(B)
NADPH
49
What are the observable effects of a riboflavin deficiency?
Answer
(D)
Both (A) and (B)
50
Vitamin B12 is the precursor for what type of coenzymes?
Answer
(A)
Cobamide