Photosynthesis in Higher Plants

The reaction centre in PS II has an absorption maximum at

1. 700 nm
2. 660 nm
3. 780 nm
4. 680 nm

Which of the following combinations is required for chemiosmosis?

1. Membrane, proton pump, proton gradient, NADP synthase
2. Proton pump, electron gradient, ATP synthase
3. Proton pump, electron gradient, NADP synthase
4. Membrane, proton pump, proton gradient, ATP synthase

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis? It involves:

1. Breakdown of proton gradient
2. Breakdown of electron gradient
3. Movement of protons across the membrane to the stroma
4. Reduction of NADP to NADPH2 on the stroma side of the membrane

What is the role of large bundle sheath cells found around the vascular bundles in C4 plants?

1. To provide the site for photorespiratory pathway
2. To increase the number of chloroplast for the operation of Calvin cycle
3. To enable the plant to tolerate high temperature
4. To protect the vascular tissue from high light intensity

When one CO2 molecule is fixed as one molecule of triose phosphate, which of the following photochemically made, high energy chemical intermediates are used in the reduction phase?

1. 2 ATP + 2 NADPH
2. 1 ATP + 1 NADPH
3. 1 ATP + 2 NADPH
4. 2 ATP + 1 NADPH

Identify the correct statements regarding chemiosmotic hypothesis: Choose the correct answer from the options given below:

1. B, C and E only
2. A, B and E only
3. A, B and D only
4. B, C and D only

The first stable product of CO2 fixation in Sorghum is

1. Phosphoglyceric acid
2. Pyruvic acid
3. Oxaloacetic acid
4. Succinic acid

Which of the following statements is incorrect?

1. Cyclic photophosphorylation involves both PS I and PS II
2. Both ATP and NADPH + H+ are synthesized during non-cyclic photophosphorylation.
3. Stroma lamellae have PS I only and lack NADP reductase
4. Grana lamellae have both PS I and PS II

In light reaction, plastoquinone facilitates the transfer of electrons from

1. PS-I to ATP synthase
2. Cytb6f complex to PS-I
3. PS-I to NADP+
4. PS-II to Cytb6f complex