MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Yeast ferments glucose into _____ |
| A. | aldehyde |
| B. | ethanol |
| C. | ketone |
| D. | lactic acid |
| Answer» C. ketone | |
| 2. |
What is the end product of glycolysis under anaerobic conditions? |
| A. | Lactic acid |
| B. | Pyruvic acid |
| C. | Oxalic acid |
| D. | Ascorbic acid |
| Answer» B. Pyruvic acid | |
| 3. |
How many carbon atoms do five molecules of pyruvic acid contain? |
| A. | 25 |
| B. | 5 |
| C. | 15 |
| D. | 20 |
| Answer» D. 20 | |
| 4. |
How many molecules of pyruvic acid are formed from 8 molecules of glucose? |
| A. | 8 |
| B. | 24 |
| C. | 16 |
| D. | 32 |
| Answer» D. 32 | |
| 5. |
If the formation of carbonic acid is uncatalyzed, how many product molecules are formed every hour? |
| A. | 25 |
| B. | 50 |
| C. | 100 |
| D. | 200 |
| Answer» E. | |
| 6. |
When the direction is specified, then the rate of a reaction is also called its velocity. True or false? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
What reaction is catalyzed by carbonic anhydrase? |
| A. | Breakdown of lipids |
| B. | Formation of cholesterol |
| C. | Formation of carbonic acid |
| D. | Breakdown of carbohydrates |
| Answer» D. Breakdown of carbohydrates | |
| 8. |
What happens to the rate of a chemical reaction when that is a 10°C change in either direction? |
| A. | The rate does not change |
| B. | The rate becomes half |
| C. | The rate doubles |
| D. | The rate doubles or becomes half |
| Answer» E. | |
| 9. |
How can we express the rate of a physical or chemical process? |
| A. | Amount of product formed per unit time |
| B. | Amount of precipitate formed per unit time |
| C. | Amount of substrate used per unit product |
| D. | Amount of time taken per unit product |
| Answer» B. Amount of precipitate formed per unit time | |
| 10. |
Which of these is an example of a chemical change? |
| A. | Melting of ice |
| B. | Evaporation of water |
| C. | Hydrolysis of glucose |
| D. | Rusting of iron |
| Answer» D. Rusting of iron | |
| 11. |
Which of these statements is true about physical changes? |
| A. | It involves the breaking of bonds |
| B. | It involves a change in shape |
| C. | It does not involve a change in shape |
| D. | Melting of ice is a physical change |
| Answer» C. It does not involve a change in shape | |
| 12. |
Up to what temperature does the enzymes of thermophilic organisms stay active? |
| A. | 90°C |
| B. | 40°C |
| C. | 35°C |
| D. | 200°C |
| Answer» B. 40°C | |
| 13. |
How are enzymes different from catalysts? |
| A. | Enzymes are active at high temperatures |
| B. | Catalysts are active at subzero temperatures |
| C. | Catalysts are efficient at high temperatures and high pressures |
| D. | Enzymes are denatured at room temperature |
| Answer» D. Enzymes are denatured at room temperature | |
| 14. |
At which part of the enzyme does the substrate fit in? |
| A. | Left end |
| B. | Right end |
| C. | Active site |
| D. | Binding site |
| Answer» D. Binding site | |
| 15. |
Which of these enzymes are not proteinaceous? |
| A. | Kinases |
| B. | Endonucleases |
| C. | Ligases |
| D. | Ribozymes |
| Answer» E. | |