Q. No.One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:
1.
Violet and green light
2.
Indigo and green light
3.
Orange and yellow light
4.
Blue and red light
In Hatch and Slack pathway, the primary CO2 acceptor is -
1. Oxaloacetic acid
2. Phosphoglyceric acid
3. Phosphoenol pyruvate
4. Rubisco
In light reaction, plastoquinone facilitates the transfer of electrons from:
| 1. | Cytb6f complex to PS I | 2. | PS I to NADP+ |
| 3. | PS I to ATP synthase | 4. | PS II to Cytb6f complex |
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:
| 1. | 1 molecule of the 3-C compound |
| 2. | 1 molecule of the 6-C compound |
| 3. | 1 molecule of a 4-C compound and 1 molecule of the 2-C compound |
| 4. | 2 molecules of the 3-C compound |
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 |
Which of the following statements is incorrect?
| 1. | RuBisCO is a bifunctional enzyme |
| 2. | In C4 plants, the site of RuBisCO activity is mesophyll cell |
| 3. | The substrate molecule for RuBisCO activity is a 5-carbon compound |
| 4. | RuBisCO action requires ATP and NADPH |
The first stable product of CO2 fixation in sorghum is:
1. Succinic acid
2. Phosphoglyceric acid
3. Pyruvic acid
4. Oxaloacetic acid
Which of the following statements is incorrect?
| 1. | Grana lamellae have both PS I and PS II. |
| 2. | Cyclic photophosphorylation involves both PS I and PS II. |
| 3. | Both ATP and NADPH + H+ are non-cyclic synthesized during photophosphorylation. |
| 4. | Stroma lamellae have PS I only and lack NADP reductase. |
It involves:
| 1. | Reduction of NADP to NADPH2 on the stroma side of the membrane |
| 2. | Breakdown of proton gradient |
| 3. | Breakdown of electron gradient |
| 4. | Movement of protons across the membrane to the stroma |
| Statement I: | The primary \(CO_2\) acceptor in \(C_4\) plants is phosphoenolpyruvate and is found in the mesophyll cells. |
| Statement II: | Mesophyll cells in \(C_4\) plants lack RuBisCO enzyme. |
| 1. | Statement I is incorrect but Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct but Statement II is incorrect. |
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