Biology Photosynthesis Practice Exam Questions

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Question	Answer	Extra information
1	they have no chloroplasts/chlorophyll [1 mark]	allow they are underground allow they don't get (access to) light allow (because) photosynthesis needs light allow they can't absorb light ignore 'sun' ignore 'it is dark'
2	carbon dioxide + water → glucose + oxygen [1 marks]
3	energy is taken in from the surroundings [1 mark] the energy source is sunlight/light energy [1 mark] more energy is absorbed than released [1 mark]
4	light intensity [1 mark] carbon dioxide concentration [1 mark] temperature [1 mark] amount of chlorophyll [1 mark]	accept light accept carbon dioxide accept chlorophyll
5	place pondweed under a lamp [1 mark] measure the number of oxygen bubbles produced per minute (rate of photosynthesis) [1 mark] move the lamp to different distances to change light intensity [1 mark]	accept heat source accept measure oxgyen bubbles accept move lamp
6	increase photosynthesis [1 mark] improve growth/yield [1 mark]
7	for respiration to release energy [1 mark] converted into starch for storage [1 mark] used to make cellulose for cell walls [1 mark] used to produce amino acids and proteins [1 mark]

Photosynthesis Practice Exam Questions