MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
During photosynthesis, which light is least effective? |
| A. | Greenlight |
| B. | Sunlight |
| C. | Yellow light |
| D. | Blue light |
| Answer» B. Sunlight | |
| 2. |
Why is light energy used in photosynthesis? |
| A. | Reduction of H<sub>2</sub>O |
| B. | Reduction of CO<sub>2</sub> |
| C. | Activation of chlorophyll |
| D. | Oxidation of C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> |
| Answer» D. Oxidation of C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> | |
| 3. |
What were the isotopes used, to research about photosynthesis? |
| A. | <sup>11</sup>C and <sup>32</sup>P |
| B. | <sup>15</sup>C and <sup>35</sup>Cl |
| C. | <sup>13</sup>C and <sup>14</sup>N |
| D. | <sup>14</sup>C and <sup>18</sup>O |
| Answer» E. | |
| 4. |
Who found out that oxygen evolved from water in photosynthesis? |
| A. | T. W. Engelmann |
| B. | C. Van Neil |
| C. | R. Hill |
| D. | Ruben and Kamen |
| Answer» D. Ruben and Kamen | |
| 5. |
In photosynthesis, the carbon dioxide is oxidized and water is reduced. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
What do we call the organism that does photosynthesis but does not release oxygen? |
| A. | Green sulfur bacterium |
| B. | Blue-green algae |
| C. | Green algae |
| D. | Green plants |
| Answer» B. Blue-green algae | |
| 7. |
Among the following, which compound does not play an important role in photosynthesis? |
| A. | Xanthophyll |
| B. | Anthocyanin |
| C. | Chlorophyll |
| D. | Phycoerythrin |
| Answer» C. Chlorophyll | |
| 8. |
Other than CO2 and light, which is used as the raw material for photosynthesis? |
| A. | O<sub>2</sub> |
| B. | CO<sub>2</sub> |
| C. | H<sub>2</sub>O |
| D. | MnO<sub>2</sub> |
| Answer» D. MnO<sub>2</sub> | |
| 9. |
Photosynthesis is the basis of life on earth because ______ |
| A. | It is the main source of all food on earth |
| B. | It helps in the release of CO<sub>2</sub> into the atmosphere |
| C. | It produces new offsprings |
| D. | It gives no energy to plants |
| Answer» B. It helps in the release of CO<sub>2</sub> into the atmosphere | |
| 10. |
During which year, Joseph Priestley discovered O2? |
| A. | 1774 |
| B. | 1770 |
| C. | 1884 |
| D. | 1880 |
| Answer» B. 1770 | |