MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Allosteric enzymes are |
| A. | larger than simple enzyme |
| B. | smaller than simple enzyme |
| C. | larger and more complex than simple enzyme |
| D. | smaller than simple enzyme but not complex |
| Answer» D. smaller than simple enzyme but not complex | |
| 2. |
Intracellular enzymes |
| A. | synthesize cellular material only |
| B. | synthesize cellular material and perform catabolic reaction |
| C. | synthesize cellular material and perform anabolic reaction |
| D. | only provide energy to the cell |
| Answer» C. synthesize cellular material and perform anabolic reaction | |
| 3. |
Organic molecules that increase the rate of metabolic reactions with themselves changing are known as |
| A. | coenzymes |
| B. | enzymes |
| C. | substrates |
| D. | reactants |
| Answer» C. substrates | |
| 4. |
Protein portion of an enzyme when it is combined with organic molecule is termed as |
| A. | apoenzyme |
| B. | co-enzyme |
| C. | holoenzyme |
| D. | co-factors |
| Answer» B. co-enzyme | |
| 5. |
The active form of enzyme is |
| A. | apoenzyme |
| B. | coenzyme |
| C. | holoenzyme |
| D. | none of these |
| Answer» D. none of these | |
| 6. |
Enzymes can |
| A. | not pass through semipermeable membrane |
| B. | pass through semipermeable membrane |
| C. | dissolve semipermeable membrane |
| D. | none of these |
| Answer» B. pass through semipermeable membrane | |
| 7. |
Who coined the word enzyme first? |
| A. | Kuhne |
| B. | Pasteur |
| C. | Liebig |
| D. | Buchner |
| Answer» B. Pasteur | |
| 8. |
The inactive protein from of enzyme is |
| A. | apoenzyme |
| B. | enzyme |
| C. | haloenzyme |
| D. | cofactor |
| Answer» B. enzyme | |
| 9. |
The inactive organic molecular portion of enzyme is |
| A. | apoenzyme |
| B. | coenzyme |
| C. | holoenzyme |
| D. | none of these |
| Answer» C. holoenzyme | |
| 10. |
Many enzymes consists of a protein combined with low molecular weight organic molecule called as |
| A. | apoenzyme |
| B. | co-enzyme |
| C. | holoenzyme |
| D. | co-factors |
| Answer» C. holoenzyme | |
| 11. |
Enzyme catalase has non-protein metal as |
| A. | magnesium |
| B. | manganese |
| C. | iron |
| D. | zinc |
| Answer» D. zinc | |
| 12. |
Enzymes are |
| A. | organic compounds produced by living organism |
| B. | inorganic compounds |
| C. | organic as well as inorganic compounds |
| D. | all of these |
| Answer» B. inorganic compounds | |
| 13. |
Main function of an enzyme is to |
| A. | increase the activation energy |
| B. | decrease the activation energy |
| C. | maintain constant activation energy |
| D. | none of these |
| Answer» C. maintain constant activation energy | |
| 14. |
Isozymes or iso enzymes are those enzyme which |
| A. | have same structural forms |
| B. | have different structural forms but identical catalytic properties |
| C. | catalyses oxidation reactions |
| D. | none of these |
| Answer» C. catalyses oxidation reactions | |