MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at |
| A. | both ends by one disulfide bond |
| B. | either end via two disulfide bonds |
| C. | either end via a single disulfide bond |
| D. | both ends by two disulfide bonds |
| Answer» E. | |
| 2. |
Selenium is an essential component of the enzyme glutathione peroxidase which |
| A. | scavenges toxic hydoperoxycompounds in tissues |
| B. | reduces toxic hydoperoxycompounds in tissues |
| C. | oxidizes toxic hydoperoxycompounds in tissues |
| D. | none of the above |
| Answer» B. reduces toxic hydoperoxycompounds in tissues | |
| 3. |
Who discovered vitamin C (ascorbic acid)? |
| A. | Paul Berg |
| B. | Linus Pauling |
| C. | Albert Szent-Gyorgyi |
| D. | Kerry Mull is |
| Answer» D. Kerry Mull is | |
| 4. |
The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin |
| A. | B12(Co2+)to B12(Co) |
| B. | B12(Co) to B12(Co2+) |
| C. | B12(Co2+)to B12(Co+) |
| D. | B12(Co+)to B12(Co2+) |
| Answer» D. B12(Co+)to B12(Co2+) | |
| 5. |
Which of the following compounds/(s) belong/(s) to the vitamin B6 group? |
| A. | Pyridoxal |
| B. | Pyridoxine |
| C. | Pyridoxamine |
| D. | All of these |
| Answer» E. | |
| 6. |
Biotin occurs mainly in combined forms bound to protein through |
| A. | ε-N-lysine moiety |
| B. | ε-S-lysine moiety |
| C. | ε-N-biotinyl-L-lysine |
| D. | ε-N-lipoyl - L-lysine |
| Answer» B. ε-S-lysine moiety | |
| 7. |
In one iron-metalloflavoprotein, the iron is present as a |
| A. | heme-protein |
| B. | nonheme type |
| C. | both (a) and (b) |
| D. | flavin moiety |
| Answer» B. nonheme type | |
| 8. |
The occurrence of metals such as iron or molybdenum in some flavoproteins can |
| A. | stabilize the semiquinone |
| B. | de-stabilize the semiquinone |
| C. | form chelation |
| D. | all of these |
| Answer» B. de-stabilize the semiquinone | |
| 9. |
A deficiency of niacin causes |
| A. | pellagra |
| B. | scurvy |
| C. | cataract |
| D. | anemia |
| Answer» B. scurvy | |
| 10. |
Name the vitamin which takes part in blood clotting? |
| A. | Vitamin E |
| B. | Vitamin K |
| C. | Vitamin D |
| D. | Folic acid |
| Answer» C. Vitamin D | |
| 11. |
Which of the following vitamin serves as a hormone precursor? |
| A. | Vitamin C |
| B. | Vitamin A |
| C. | Vitamin K |
| D. | Vitamin D |
| Answer» E. | |
| 12. |
Name the vitamin which functions as hormone as well as visual pigment? |
| A. | Thiamine |
| B. | Riboflavin |
| C. | Retinol |
| D. | Folic acid |
| Answer» D. Folic acid | |
| 13. |
All fat-soluble vitamin has a coenzyme function. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
NAME_THE_VITAMIN_WHICH_FUNCTIONS_AS_HORMONE_AS_WELL_AS_VISUAL_PIGMENT??$ |
| A. | Thiamine |
| B. | Riboflavin |
| C. | Retinol |
| D. | Folic acid |
| Answer» D. Folic acid | |
| 15. |
Name the vitamin which takes part in blood clotting?$ |
| A. | Vitamin E |
| B. | Vitamin K |
| C. | Vitamin D |
| D. | Folic acid |
| Answer» C. Vitamin D | |
| 16. |
Which_of_the_following_vitamin_serves_as_a_hormone_precursor?$ |
| A. | Vitamin C |
| B. | Vitamin A |
| C. | Vitamin K |
| D. | Vitamin D |
| Answer» E. | |
| 17. |
Name the structure analog of vitamin K, which is used as anticoagulant? |
| A. | Warfarin |
| B. | Tocopherol |
| C. | Ergocalciferol |
| D. | β-carotene |
| Answer» B. Tocopherol | |
| 18. |
All fat-soluble vitamin has a coenzyme function? |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Mark the INCORRECT statement about Ascorbic acid. |
| A. | It is a strong reducing agent |
| B. | It can have synthesized in the body |
| C. | Involves in hydroxylation of prolyl- and lysyl- residues of collagen |
| D. | Shows antioxidant activity |
| Answer» C. Involves in hydroxylation of prolyl- and lysyl- residues of collagen | |
| 20. |
Which of the following vitamin is also known as cobalamin? |
| A. | Vitamin B11 |
| B. | Vitamin B12 |
| C. | Vitamin B6 |
| D. | Vitamin B2 |
| Answer» C. Vitamin B6 | |
| 21. |
Megaloblastic anemia is caused due to deficiency of ___________ |
| A. | Cobalamin |
| B. | Pyridoxine |
| C. | Niacin |
| D. | Folic acid |
| Answer» E. | |
| 22. |
Which of the following is a component of the coenzyme A? |
| A. | Retinol |
| B. | Pantothenic acid |
| C. | Pyridoxine |
| D. | Retinoic acid |
| Answer» C. Pyridoxine | |
| 23. |
Name the disease caused by the deficiency of Niacin? |
| A. | Pellagra |
| B. | Rickets |
| C. | Scurvy |
| D. | Pernicious anemia |
| Answer» B. Rickets | |
| 24. |
Deficiency of which vitamin causes Beri-Beri? |
| A. | Vitamin B12 |
| B. | Vitamin B2 |
| C. | Vitamin B6 |
| D. | Vitamin B1 |
| Answer» E. | |
| 25. |
Which of the following is not a fat-soluble vitamin? |
| A. | Vitamin D |
| B. | Vitamin K |
| C. | Vitamin C |
| D. | Vitamin A |
| Answer» D. Vitamin A | |