Photosynthesis (Exam Questions)

Question 1

ATP is an abbreviation. What does it stand for. (3)

Explain briefly the role of ATP in the energy exchanges of a cell (2x3)

Answer 1

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Question 2

Give an account of what happens on each of the Pathways (18)

Answer 2

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Question 3

What is the fate of each of the products of the light dependant stage(3x3)

Answer 3

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Question 4

Graph on rate of photosynthesis in relation to light intensity or CO2 concentration

Answer 4

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Question 5

What is the primary role of chloropyhll in photosynthesis (3)

Answer 5

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Question 6

write an equation to summarize photosynthesis (6)

Answer 6

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Question 7

why is the dark stage given the alternative name the light-independant stage (3)

Answer 7

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Question 8

Name a gas that is essential for the dark stage (3)

Answer 8

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Question 9

Two products of the light stage are vital for the dark stage. Name each of them. (2x3)
State the precise role in the dark stage of each of the substances that you named above (2x3)

Answer 9

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Question 10

To what group of biomolecules do the main products of the dark stage belong (6)

Answer 10

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Question 11

Where in the cell does photosynthesis take place

Answer 11

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Question 12

Give two sources of carbon dioxide that is found in the atmosphere

Answer 12

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Question 13

Suggest one way in which the rate of photosynthesis of plants in a greenhouse could be increased

Answer 13

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Question 14

Briefly outline how water from the soil reaches the leaf (6x3)

Answer 14

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Question 15

What happens to water molecules when they reach the sites of photosynthesis (3x3)

Answer 15

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Question 16

State a precise role for

1. Carbon dioxide (3)
2. Water (3)

Answer 16

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Question 17

Name the openings in the leaf which allow the entry of carbon dioxide for photosynthesis (3)
State a factor which influences the diameter of these openings (3)

Answer 17

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Question 18

During photosynthesis oxygen is produced

1. From what substance is oxygen produced (3)
2. In what stage of photosynthesis is oxygen produced (3)
3. Give two possible fates of oxygen following its production (3)

Answer 18

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Question 19

Give an account of the role of each of the following in photosynthesis

1. ATP (6)
2. NADP (6)

Answer 19

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Question 20

Where in a plant cell does photosynthesis take place (3)

Answer 20

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Question 21

Give the alternative name of the first stage of photosynthesis (3)

Answer 21

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Question 22

During the first stage of photosynthesis energised electrons enter two pathways

1. where do the energised electrons come from (3)
2. Briefly describe the main events of each of these pathways (4x3)

Answer 22

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Question 23

In the second stage of photosynthesis compounds of the general formula Cx(H20)y are formed.
What name is given to this group of compund (3)

Answer 23

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Question 24

From which simple compound does the plant obtain the H used to make compounds of the general formula Cx(H20)y (3)

Answer 24

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Question 25

Name the simple compound that supplies the neccessary energy for the second stage reactions (3)

Answer 25

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