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 |
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
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. |
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: | \(CO_2\) acceptor in \(C_4\) plants is phosphoenolpyruvate and is found in the mesophyll cells. | The primary
Statement II: | \(C_4\) plants lack RuBisCO enzyme. | Mesophyll cells in