14. (a) (i) In which cell organelle does photosynthesis occur?
(ii) Name the pigment essential for photosynthesis - Leaving Cert Biology - Question 14 - 2022
Question 14
14. (a) (i) In which cell organelle does photosynthesis occur?
(ii) Name the pigment essential for photosynthesis.
(iii) Describe one way in which horticulturists ca... show full transcript
Worked Solution & Example Answer:14. (a) (i) In which cell organelle does photosynthesis occur?
(ii) Name the pigment essential for photosynthesis - Leaving Cert Biology - Question 14 - 2022
Step 1
In which cell organelle does photosynthesis occur?
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Answer
Photosynthesis occurs in the chloroplast.
Step 2
Name the pigment essential for photosynthesis.
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Answer
The essential pigment for photosynthesis is chlorophyll.
Step 3
Describe one way in which horticulturists can increase plant yields in greenhouses.
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Answer
Horticulturists can increase plant yields by maintaining optimal conditions of light and carbon dioxide levels, including using specific types of grow lights to enhance photosynthesis.
Step 4
What is the name given to this process?
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Answer
The process is referred to as photolysis.
Step 5
Identify molecule X, produced as a by-product of the splitting of water.
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Answer
Molecule X is oxygen (O₂).
Step 6
Identify molecule Y.
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Answer
Molecule Y is NADPH.
Step 7
Describe how molecule Y is produced.
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Answer
Molecule Y (NADPH) is produced when electrons are added to NADP⁺ during the light-dependent reactions.
Step 8
Name stage 2 shown in the diagram above.
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Answer
Stage 2 is known as the Calvin Cycle.
Step 9
What does ATP stand for?
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Answer
ATP stands for adenosine triphosphate.
Step 10
What is the role of ATP in stage 2 of photosynthesis as shown in the diagram?
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Answer
The role of ATP in stage 2 is to provide energy to drive the reactions that convert carbon dioxide into glucose.
Step 11
Identify molecule Z, the product of stage 2.
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Answer
Molecule Z is glucose.
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