MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which out of the following enzymes can utilize both NAD+ and NADP+ as a coenzyme? |
| A. | Glutamate dehydrogenase |
| B. | Alcohol dehydrogenase |
| C. | Aldehyde dehydrogenase |
| D. | Glycerol-3-P dehydrogenase |
| Answer» B. Alcohol dehydrogenase | |
| 2. |
Which of the following enzyme catalyzes the first step in the catabolism of ethanol? |
| A. | Alcohol dehydrogenase |
| B. | Lactate dehydrogenase |
| C. | Glutamate dehydrogenase |
| D. | Malate dehydrogenase |
| Answer» B. Lactate dehydrogenase | |
| 3. |
Gain of electrons can be termed as ___________ |
| A. | Metabolism |
| B. | Anabolism |
| C. | Oxidation |
| D. | Reduction |
| Answer» E. | |
| 4. |
Loss of electrons can be termed as ______________ |
| A. | Metabolism |
| B. | Anabolism |
| C. | Oxidation |
| D. | Reduction |
| Answer» D. Reduction | |
| 5. |
Which one out of the following is not a NAD+ requiring enzyme? |
| A. | Lactate dehydrogenase |
| B. | Pyruvate dehydrogenase complex |
| C. | Maltate dehydrogenase |
| D. | Acyl co-A dehydrogenase |
| Answer» E. | |
| 6. |
WHICH_OF_THE_FOLLOWING_ENZYME_CATALYZES_THE_FIRST_STEP_IN_THE_CATABOLISM_OF_ETHANOL??$ |
| A. | Alcohol dehydrogenase |
| B. | Lactate dehydrogenase |
| C. | Glutamate dehydrogenase |
| D. | Malate dehydrogenase |
| Answer» B. Lactate dehydrogenase | |
| 7. |
Which_out_of_the_following_enzymes_can_utilize_both_NAD+_and_NADP+_as_a_coenzyme?$ |
| A. | Glutamate dehydrogenase |
| B. | Alcohol dehydrogenase |
| C. | Aldehyde dehydrogenase |
| D. | Glycerol-3-P ddehydrogenase |
| Answer» B. Alcohol dehydrogenase | |
| 8. |
Loss of electrons can be termed as |
| A. | Metabolism |
| B. | Anabolism |
| C. | Oxidation |
| D. | Reduction |
| Answer» D. Reduction | |
| 9. |
Which of the following statements is incorrect about oxidase? |
| A. | They catalyze reactions involving hydrogen peroxide |
| B. | They catalyze reaction using O2 as a hydrogen acceptor |
| C. | They catalyze reactions using niacin as coenzyme |
| D. | They catalyze reactions of direct incorporation of O2 into the substrate |
| Answer» C. They catalyze reactions using niacin as coenzyme | |
| 10. |
Which of the following enzyme catalyses the direct transfer and incorporation of O2 into a substrate molecule is |
| A. | Reductase |
| B. | Oxidase |
| C. | Oxygenase |
| D. | Peroxidase |
| Answer» D. Peroxidase | |
| 11. |
Which one out of the following is not a NAD+ requiring enzyme? |
| A. | Lactate dehydrogenase |
| B. | Pyruvate dehydrogenase complex |
| C. | Maltate dehydrogenase |
| D. | Acyl co-A dehydrogenase |
| Answer» E. | |
| 12. |
Which out of the following has the highest redox potential? |
| A. | NAD |
| B. | FMN |
| C. | FAD |
| D. | O<sub>2</sub> |
| Answer» E. | |
| 13. |
Which out of the following is not a flavoprotein? |
| A. | Succinate dehydrogenase |
| B. | Cytochrome c |
| C. | Xanthine oxidase |
| D. | NADH dehydrogenase-Qreductase |
| Answer» C. Xanthine oxidase | |
| 14. |
Which of the following statements about redox potential is false? |
| A. | NADH/NAD<sup>+</sup> redox pair has the least redox potential |
| B. | Oxygen/H<sub>2</sub>O redox pair has the highest redox potential |
| C. | The components of electron transport chain are organized in terms of their redox potential |
| D. | The redox potential of a system is usually compared with the potential of the hydrogen electrode |
| Answer» B. Oxygen/H<sub>2</sub>O redox pair has the highest redox potential | |