Vitamins And Coenzymes(Biochemistry ) Questions and answers for exam Preparation

Question 1. The symptoms of retinol excess are

all of these
bone fragility
nausea
weakness

Explanation:-

Answer: Option A. -> all of these

Question 2. Main function of insulin hormone is to

increase blood sugar
increase glycogen in liver
decrease glycogen in liver
decrease blood sugar

Explanation:-

Answer: Option D. -> decrease blood sugar

Question 3. Ascorbic acid acts as an

oxidizing agent
oxidizing and reducing agent both
reducing agent
None of these

Explanation:-

Answer: Option C. -> reducing agent

Question 4. Acyl carrier protein (ACP) plays an important role in the biosynthesis of

sugars
amino acids
fatty acids
carbohydrates

Explanation:-

Answer: Option C. -> fatty acids

Question 5. A deficiency of thiamin produces the disease known as

cataract
scurvy
anemia
beri-beri

Explanation:-

Answer: Option D. -> beri-beri

Question 6. The absence of ascorbic acid in the human diet gives rise to

pernicious anemia
beri-beri
cataract
rickets

Explanation:-

Answer: Option A. -> pernicious anemia

Question 7. Vitamin B12 (Cobalamin) is only synthesized by

fishes
micro-organisms
animals
plants

Explanation:-

Answer: Option B. -> micro-organisms

Question 8. Vitamins are essential because the organism

None of these
can't synthesize these compounds at all
can't synthesize these compounds in the adequate amounts
can synthesize these compounds partially

Explanation:-

Answer: Option B. -> can't synthesize these compounds at all

Question 9. The prosthetic group biotin is a carrier of which type of molecule?

Sulfhydryl group
Methyl group
Ammonia
Activated carbon dioxide (CO2)

Explanation:-

Answer: Option D. -> Activated carbon dioxide (CO2)

Question 10. Which of the following are reduced coenzymes?

Coenzyme A and ubiquinone
NAD+ and FAD
NADH and FADH2
ATP and GTP

Explanation:-

Answer: Option C. -> NADH and FADH2