(i) Name the openings in the leaf which allow the entry of carbon dioxide for photosynthesis - Leaving Cert Biology - Question a - 2008
Question a
(i) Name the openings in the leaf which allow the entry of carbon dioxide for photosynthesis. State a factor which influences the diameter of these openings.
(ii)... show full transcript
Worked Solution & Example Answer:(i) Name the openings in the leaf which allow the entry of carbon dioxide for photosynthesis - Leaving Cert Biology - Question a - 2008
Step 1
Name the openings in the leaf which allow the entry of carbon dioxide for photosynthesis.
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Answer
The openings in the leaf that allow the entry of carbon dioxide for photosynthesis are called stomata.
Step 2
State a factor which influences the diameter of these openings.
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Answer
The diameter of the stomata is influenced by factors such as light availability, carbon dioxide concentration, or the turgidity of guard cells. Particularly, the light intensity has a significant effect, as more light can cause the stomata to open wider.
Step 3
From what substance is oxygen produced?
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Answer
Oxygen is produced during photosynthesis from water (H₂O), which is split during the light-dependent reactions.
Step 4
In which stage of photosynthesis is oxygen produced?
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Oxygen is produced during the light-dependent stage of photosynthesis.
Step 5
Give two possible fates of oxygen following its production.
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Following its production, oxygen can either diffuse into the atmosphere, where it is available for respiration by living organisms, or be used in the respiration processes of the plant itself.
Step 6
Give an account of the role of ATP in photosynthesis.
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ATP (adenosine triphosphate) provides and stores energy for the synthesis of glucose during photosynthesis. It is produced during the light-dependent reactions and is utilized in the Calvin cycle, particularly in the dark stage.
Step 7
Give an account of the role of NADP in photosynthesis.
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NADP (nicotinamide adenine dinucleotide phosphate) serves as an electron carrier in photosynthesis. It accepts high-energy electrons during the light-dependent reactions, which are then used in the dark stage for the reduction of carbon dioxide to form glucose.
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