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The following statements were made about an enzyme involved in photosynthesis: 1 - Scottish Highers Biology - Question 18 - 2023
Question 18
The following statements were made about an enzyme involved in photosynthesis: 1. RuBP changes shape to better fit RuBisCO. 2. RuBisCO converts G3P to glucose. 3. Ru... show full transcript
Worked Solution & Example Answer:The following statements were made about an enzyme involved in photosynthesis: 1 - Scottish Highers Biology - Question 18 - 2023
Step 1
2 only
Answer
Statement 2 is correct. RuBisCO indeed converts G3P (glyceraldehyde-3-phosphate) into glucose during the Calvin cycle, which is a crucial step in the process of photosynthesis.
Statement 1 is incorrect. RuBP (ribulose bisphosphate) does not change shape to better fit RuBisCO; rather, it is the substrate that binds to the enzyme at the active site.
Statement 3 is incorrect. While RuBisCO does play a role in carbon fixation, it catalyzes the reaction between RuBP and carbon dioxide to form 3-PGA (3-phosphoglycerate) and does not directly catalyze the fixation itself. Therefore, only statement 2 is true.