Discussion
Home ‣ Biochemistry ‣ Vitamins and Coenzymes Comments
- Question
Which of the following are reduced coenzymes?
Options- A. NADH and FADH2
- B. NAD+ and FAD
- C. ATP and GTP
- D. Coenzyme A and ubiquinone
- Correct Answer
- NADH and FADH2
- 1. A deficiency of thiamin produces the disease known as
Options- A. beri-beri
- B. scurvy
- C. cataract
- D. anemia Discuss
- 2. Which of the following compounds/(s) belong/(s) to the vitamin B6 group?
Options- A. Pyridoxal
- B. Pyridoxine
- C. Pyridoxamine
- D. All of these Discuss
- 3. Vitamin B12 is useful in the prevention and treatment of
Options- A. pernicious anemia
- B. scurvy
- C. cataract
- D. beri-beri Discuss
- 4. The occurrence of metals such as iron or molybdenum in some flavoproteins can
Options- A. stabilize the semiquinone
- B. de-stabilize the semiquinone
- C. form chelation
- D. all of these Discuss
- 5. The disease Beriberi is due to a dietary deficiency in
Options- A. vitamin B1 (thiamine)
- B. vitamin B2 (riboflavin)
- C. vitamin B6 (pyridoxine)
- D. vitamin B12 Discuss
- 6. Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of
Options- A. four isoprene units
- B. six isoprene units
- C. nine isoprene units
- D. four isoprene units Discuss
- 7. Biotin occurs mainly in combined forms bound to protein through
Options- A. ?-N-lysine moiety
- B. ?-S-lysine moiety
- C. ?-N-biotinyl-L-lysine
- D. ?-N-lipoyl - L-lysine Discuss
- 8. An early sign of retinol deficiencies in man is
Options- A. night blindness
- B. keratinization
- C. xeropthalmia
- D. none of these Discuss
- 9. Dihydroorotate dehydrogenase contains
Options- A. 4 flavins and 4 atoms of iron per molecule
- B. 2 flavins and 4 atoms of iron per molecule
- C. 2 flavins and 2 atoms of iron per molecule
- D. 4 flavins and 2 atoms of iron per molecule Discuss
- 10. Which of these is a symptom of vitamin A deficiency?
Options- A. Osteoporosis
- B. Impaired taste perception
- C. Blindness
- D. Impaired blood clotting Discuss
Vitamins and Coenzymes problems
Search Results
Correct Answer: beri-beri
Correct Answer: All of these
Correct Answer: pernicious anemia
Correct Answer: stabilize the semiquinone
Correct Answer: vitamin B1 (thiamine)
Correct Answer: four isoprene units
Correct Answer: ?-N-lysine moiety
Correct Answer: night blindness
Correct Answer: 4 flavins and 4 atoms of iron per molecule
Correct Answer: Blindness
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