Molecular Biology Answers

1.6) The reaction centre pigment in plant photosystem II is

1. P₂
2. P₁₂₀
3. P₆₈₀
4. P₇₀₀
5. P₈₇₀

1.6) When comparing the light reaction with the Calvin cycle of photosynthesis in plants which phase requires Carbon dioxide?

1. Both the light reactions and the Calvin cycle.
2. The stoma of a leaf requires carbon dioxide.
3. The Calvin cycle alone
4. Light reactions alone
5. Neither the light reactions nor the Calvin cycle.

1.6) In comparing the light reaction with the Calvin cycle of photosynthesis in plants which phase requires ATP?

1. Neither the light reactions nor the Calvin cycle
2. Light reaction alone
3. Occurs in the chloroplast but is not part of photosynthesis
4. The Calvin cycle alone
5. Both the light reactions and the Calvin cycle

1.6) In comparing the light reaction with the Calvin cycle of photosynthesis in plants which  of them produces NADPH?

1. Neither the light reactions nor the Calvin cycle
2. Light reaction alone
3. Occurs in the chloroplast but is not part of photosynthesis
4. The Calvin cycle alone
5. Both the light reactions and the Calvin cycle

1.6) In comparing the light reaction with the Calvin cycle of photosynthesis in plants which  of them produces NADPH?

1. Neither the light reactions nor the Calvin cycle
2. Light reaction alone
3. Occurs in the chloroplast but is not part of photosynthesis
4. The Calvin cycle alone
5. Both the light reactions and the Calvin cycle

1.6) Which of the events listed below occur in the light reactions of photosynthesis?

1. ATP is phosphorylated to yield ADP
2. Light is absorbed and funnelled to reaction-centre chlorophyll a.
3. NADP is produced
4. Carbon dioxide is incorporated into PGA
5. NADPH is reduced to NADP⁺

1.6)In the thylakoid membranes, what is the main role of the light-harvesting complex?

1. Synthesize ATP from ADP and Pi
2. Concentrate photons within the stroma
3. Harvest photons and transfer light energy to the reaction-centre chlorophyll
4. Split water and release oxygen to the reaction-centre chlorophyll
5. Transfer electrons to ferredoxin and then NADPH

1.6) Where does the Calvin cycle take place?

1. Outer membrane of the chloroplast
2. Cytoplasm surrounding the chloroplast
3. Thylakoid membrane
4. Chlorophyll molecule
5. Stroma of the chloroplast

1.6) Where does the Calvin cycle take place?

1. Outer membrane of the chloroplast
2. Cytoplasm surrounding the chloroplast
3. Thylakoid membrane
4. Chlorophyll molecule
5. Stroma of the chloroplast

1.6) What are the products of the light reactions that are subsequently used by the Calvin cycle?

1. Carbon dioxide and RuBP
2. Water and carbon
3. Electrons and photons
4. Oxygen and carbon dioxide
5. ATP and NADPH