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A chloroplast is surrounded by a double membrane - VCE - SSCE Biology - Question 2 - 2019 - Paper 1
Question 2
A chloroplast is surrounded by a double membrane. i. Name two molecules, as inputs for photosynthesis, that would need to diffuse from the cytosol of the plant cell... show full transcript
Worked Solution & Example Answer:A chloroplast is surrounded by a double membrane - VCE - SSCE Biology - Question 2 - 2019 - Paper 1
Step 1
Step 2
Account for the differences in oxygen concentrations found in this region.
Answer
During photosynthesis, water is split in the light-dependent reactions to produce oxygen gas. In Region R, when light is available, oxygen is produced extensively and diffuses into the stroma. Conversely, when light is not available, the oxygen production ceases, leading to lower concentrations of oxygen in that region.
Step 3
Describe the role played by each of the coenzymes NADPH and ATP in photosynthesis.
Answer
NADPH plays a crucial role in transferring hydrogen ions, which are essential for the reduction reactions in the Calvin cycle. It carries protons and electrons, facilitating the synthesis of glucose. ATP, on the other hand, serves as the primary energy currency of the cell, providing the necessary energy for various reactions throughout the photosynthetic process.