Which of the following is the product formed from carbon dioxide during the dark stage of photosynthesis?

Prepare for the Leaving Certificate Photosynthesis exam. Use flashcards and multiple choice questions with hints and explanations. Ace your exam!

Multiple Choice

Which of the following is the product formed from carbon dioxide during the dark stage of photosynthesis?

Explanation:
In the dark stage, also known as the Calvin cycle, carbon dioxide is fixed and rebuilt into organic molecules using energy from ATP and reducing power from NADPH. The cycle produces glyceraldehyde-3-phosphate, a three-carbon sugar, which is a carbohydrate. From these triose sugars, the plant can ultimately synthesize other carbohydrates such as glucose and starch, but the product formed directly from CO2 in this stage is carbohydrate. Lipids are not produced in this cycle, and while glucose and starch are possible forms, they are specific carbohydrate products that arise from the broader carbohydrate pool created by this process.

In the dark stage, also known as the Calvin cycle, carbon dioxide is fixed and rebuilt into organic molecules using energy from ATP and reducing power from NADPH. The cycle produces glyceraldehyde-3-phosphate, a three-carbon sugar, which is a carbohydrate. From these triose sugars, the plant can ultimately synthesize other carbohydrates such as glucose and starch, but the product formed directly from CO2 in this stage is carbohydrate. Lipids are not produced in this cycle, and while glucose and starch are possible forms, they are specific carbohydrate products that arise from the broader carbohydrate pool created by this process.

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