A Level Biology – Light dependent stage of photosynthesis
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Question 1 of 25
1. Question
The essential products of the light dependent reaction are
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Question 2 of 25
2. Question
Which one of the following is not involved in both aerobic respiration and photosynthesis?
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Question 3 of 25
3. Question
Which of the following are products of non-cyclic photophosphorylation but not of cyclic photophosphorylation?
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Question 4 of 25
4. Question
During photosynthesis, the oxygen liberated results from the breakdown of
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Question 5 of 25
5. Question
Which product[s] of the light dependent stage of photosynthesis are used in the light independent stage of photosynthesis?
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Question 6 of 25
6. Question
In the primary reaction center of photosystem 1 [PS1] the chlorophyll a molecule has a maximum absorption of
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Question 7 of 25
7. Question
Reduction is
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Question 8 of 25
8. Question
When a chlorophyll molecule absorbs light energy what is emitted from the molecule?
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Question 9 of 25
9. Question
When a chlorophyll molecule absorbs light energy, the molecule becomes ionised. What is this process called?
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Question 10 of 25
10. Question
During non-cyclic photophosphorylation, electrons are emitted from primary chlorophyll pigments in reaction centres situated in
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Question 11 of 25
11. Question
Non cyclic photophosphorylation is known as the
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Question 12 of 25
12. Question
The final electron acceptor in cyclic photophosphorylation is
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Question 13 of 25
13. Question
When photons of light are absorbed by P680, the deficit of electrons in P680 is replenished by
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Question 14 of 25
14. Question
Which enzyme, situated on the outer thylakoid membrane, catalyses the reduction of NADP?
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Question 15 of 25
15. Question
What form a transfer chain within the thylakoid membranes?
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Question 16 of 25
16. Question
During photophosphorylation, ATP is produced by
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Question 17 of 25
17. Question
How do hydrogen ions enter the thylakoid space from the stroma?
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Question 18 of 25
18. Question
What process contributes to the lowering of the pH inside the thylakoid space?
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Question 19 of 25
19. Question
Why do hydrogen ions move back from the thylakoid space into the stroma?
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Question 20 of 25
20. Question
Why do hydrogen ions only move from the thylakoid space into the stroma through ATP synthase channels?
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Question 21 of 25
21. Question
As hydrogen ions pass through ATP synthase channels, energy is transferred to enable
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Question 22 of 25
22. Question
What is the final electon acceptor in non cyclic photophosphorylation?
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Question 23 of 25
23. Question
What happens to the hydrogen ions produced during the splitting of water?
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Question 24 of 25
24. Question
How are chloroplasts adapted to capturing light energy?
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Question 25 of 25
25. Question
A student investigated the gas exchange of canadian pondweed at a temperature of 16oC. In the light, the pondweed released oxygen at a rate of 200cm3 hr-1. In the dark the pondweed absorbed oxygen at a rate of 60cm3 h-1. What is the best estimate of the gross rate of photosynthesis by the pondweed at 16oC in cm3 hr-1?
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