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. |
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. | 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 |
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 |
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
What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?
1. | To protect the vascular tissue from high light intensity. |
2. | To provide the site for photorespiratory pathway. |
3. | To increase the number of chloroplast for the operation of Calvin cycle. |
4. | To enable the plant to tolerate high temperature. |
The products of light reaction in photosynthesis are:
1. ATP, NADPH and \(\text{O}_2\)
2. ATP, NADPH, \(\text{O}_2\) and \(\text{H}_2 \text{O}\)
3. ATP, NADPH and \(\text{H}_2 \text{O}\)
4. ATP, NADPH and \(\text{CO}_2\)
The ratio of carbon dioxide fixation between C4 plants and C3 plants is :
1. | 2:1 | 2. | 2: 3 |
3. | 1:1 | 4. | 1:2 |