What happens during carbon fixation?
A. Carbon dioxide is added to a five carbon sugar, making it a six carbon sugar.
B. Carbon dioxide is broken apart to release carbon and oxygen gas.
C. Sucrose is made by combining fructose and glucose.
D. ATP and NADPH are synthesized.
What happens during carbon fixation?
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The correct answer is A. Carbon dioxide is added to a five carbon sugar, making it a six carbon sugar.
During carbon fixation, which is a part of the Calvin cycle in photosynthesis, carbon dioxide (CO₂) is incorporated into a five-carbon sugar called ribulose bisphosphate (RuBP). This reaction is facilitated by the enzyme Rubisco, resulting in a six-carbon compound that quickly splits into two three-carbon molecules (3-phosphoglycerate or 3-PGA). This process is crucial for converting inorganic carbon from the atmosphere into organic molecules that plants use for energy and growth.
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The correct answer is A. Carbon dioxide is added to a five carbon sugar, making it a six carbon sugar.
During carbon fixation, which occurs in the Calvin cycle of photosynthesis, carbon dioxide (CO2) is incorporated into a five-carbon sugar called ribulose bisphosphate (RuBP). This reaction is catalyzed by the enzyme RuBisCO, resulting in a six-carbon compound that quickly splits into two three-carbon molecules known as 3-phosphoglycerate (3-PGA). This process is a crucial step in converting inorganic carbon into organic compounds that can be used by plants. If you want to explore this topic further, feel free to check our extended services page for more in-depth information!