- 1(current)
Q. No.Consider the situation where photosynthesis is going on at a steady pace in a typical experiment with a light on, and carbon dioxide is being combined with ribulose-bisphosphate (RuBP) to produce 3-phosphoglycerate (3PG). Then suddenly the source of carbon dioxide is eliminated. What changes in the concentrations of 3PG and RuBP would occur?
| 1. | 3PG levels rise, RuBP levels fall. |
| 2. | 3PG levels fall, RuBP levels rise. |
| 3. | 3PG levels rise, RuBP levels rise. |
| 4. | 3PG levels fall, RuBP levels fall. |
PGA as the first CO2 fixation was discovered in the photosynthesis of
| 1. | bryophyte | 2. | gymnosperm |
| 3. | angiosperm | 4. | algae |
Hill reaction occurs in:
1. high altitude plants
2. total darkness
3. absence of water
4. presence of ferricyanide
| 1. | ATP | 2. | NADH |
| 3. | NADPH | 4. | Oxygen |
Cyclic -photophosphorylation results in the formation of:
1. NADPH
2. ATP and NADPH
3. ATP, NADPH, and O2
4. ATP
During non-cyclic photophosphorylation, when electrons are lost from the reaction center at PS II, what is the source which replaces these electrons?
1. Oxygen
2. Water
3. Carbon dioxide
4. Light
| I: | A possible location where this could be happening is in the stroma lamellae. |
| II: | While the membrane or lamellae of the grana have both PS I and PS II, the stroma lamellae membranes lack PS II as well as NADP reductase enzyme. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
| Assertion (A): | RuBisCO has affinity for both the gases: CO2 and O2. |
| Reason (R): | RuBisCO is the most abundant enzyme in the biosphere. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True, but (R) is not the correct explanation of (A). |
| 3. | (A) is True, but (R) is False. |
| 4. | (A) is False, but (R) is True. |
| Assertion (A): | The cyclic flow hence, results only in the synthesis of ATP, but not of NADPH + H+. |
| Reason (R): | The excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not explain (A) |
- 1(current)
Q. No.
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