MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Photosystem I used which of the following in its photo-center? |
| A. | P700 |
| B. | P800 |
| C. | P900 |
| D. | P600 |
| Answer» B. P800 | |
| 2. |
The earliest photo synthesizers used which of the following as the source of hydrogen? |
| A. | CO2 |
| B. | C6H12O6 |
| C. | H2O |
| D. | H2S |
| Answer» E. | |
| 3. |
The carbon-assimilation reactions require ATP and NADPH in the ratio ___________ |
| A. | 3:2 |
| B. | 2:3 |
| C. | 3:4 |
| D. | 4:3 |
| Answer» B. 2:3 | |
| 4. |
Photosynthesis takes place in sac like membranes called ___________ |
| A. | Thylakoids |
| B. | Grana |
| C. | Photosystems |
| D. | Photons |
| Answer» B. Grana | |
| 5. |
Which pigment is used in human vision? |
| A. | Retinal |
| B. | Vitamin A |
| C. | Ferredoxin |
| D. | Beta-carotene |
| Answer» B. Vitamin A | |
| 6. |
When compared to retinal, chlorophyll can be described as a pigment that has a ____________ |
| A. | Narrow absorption range but high efficiency |
| B. | Narrow absorption range but low efficiency |
| C. | Wide absorption range but high efficiency |
| D. | Wide absorption range but low efficiency |
| Answer» B. Narrow absorption range but low efficiency | |
| 7. |
If 8 photons are required to produce one molecule of O2, how many photons are required to produce one molecule of glucose? |
| A. | 6 |
| B. | 8 |
| C. | 48 |
| D. | 12 |
| Answer» D. 12 | |
| 8. |
PHOTOSYSTEM_I_USES_WHICH_OF_THE_FOLLOWING_IN_ITS_PHOTO-CENTER??$ |
| A. | P700 |
| B. | P800 |
| C. | P900 |
| D. | P600 |
| Answer» B. P800 | |
| 9. |
THE_EARLIEST_PHOTO_SYNTHESIZERS_USED_WHICH_OF_THE_FOLLOWING_AS_THE_SOURCE_OF_HYDROGEN??$ |
| A. | CO<sub>2</sub> |
| B. | C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> |
| C. | H2O |
| D. | H2S |
| Answer» E. | |
| 10. |
Which of the following systems has an associated water splitting activity resembling that of plants? |
| A. | Photosystem |
| B. | Photosystem I |
| C. | Photosystem II |
| D. | Photosystem III |
| Answer» D. Photosystem III | |
| 11. |
The carbon-assimilation reactions require ATP and NADPH in the ratio |
| A. | 3:2 |
| B. | 2:3 |
| C. | 3:4 |
| D. | 4:3 |
| Answer» B. 2:3 | |
| 12. |
Photosynthesis takes place in sac like membranes called |
| A. | Thylakoids |
| B. | Grana |
| C. | Photosystems |
| D. | Photons |
| Answer» B. Grana | |
| 13. |
Why light is required for light dependent reactions? |
| A. | It splits ATP molecules which generates the energy necessary to power the light independent reactions |
| B. | It is the source for electrons |
| C. | It splits the water molecules |
| D. | It energizes electrons in the reaction center |
| Answer» E. | |
| 14. |
The pigment used in human vision is |
| A. | Retinal |
| B. | Vitamin A |
| C. | Ferredoxin |
| D. | Beta-carotene |
| Answer» B. Vitamin A | |
| 15. |
Which of the following is the correct sequence for the movement of electrons during the light-dependent reactions of plants? |
| A. | P<sub>700</sub>, P<sub>680</sub>, NADP<sup>+</sup>, water |
| B. | P<sub>680</sub>, water, P<sub>700</sub>, NADP<sup>+</sup> |
| C. | Water, P<sub>700</sub>, NADP<sup>+</sup>, P<sub>680</sub> |
| D. | Water, P<sub>680</sub>, P<sub>700</sub>, NADP<sup>+</sup> |
| Answer» E. | |
| 16. |
When compared to retinal, chlorophyll can be described as a pigment that has a |
| A. | Narrow absorption range but high efficiency |
| B. | Narrow absorption range but low efficiency |
| C. | Wide absorption range but high efficiency |
| D. | Wide absorption range but low efficiency |
| Answer» B. Narrow absorption range but low efficiency | |
| 17. |
If 8 photons are required to produce one molecule of O2, how many photons are required to produce one molecule of glucose? |
| A. | 6 |
| B. | 8 |
| C. | 48 |
| D. | 12 |
| Answer» D. 12 | |