Questions: Which of the following statements is NOT true concerning photosynthesis? It converts organic carbon to inorganic carbon It is an endergonic reaction It is a redox reaction moving electrons from oxygen to carbon It converts light energy into chemical energy The calvin cycle does not harvest light energy.

Which of the following statements is NOT true concerning photosynthesis? It converts organic carbon to inorganic carbon It is an endergonic reaction It is a redox reaction moving electrons from oxygen to carbon It converts light energy into chemical energy The calvin cycle does not harvest light energy.
Transcript text: Which of the following statements is NOT true concerning photosynthesis? It converts organic carbon to inorganic carbon It is an endergonic reaction It is a redox reaction moving electrons from oxygen to carbon It converts light energy into chemical energy The calvin cycle does not harvest light energy.
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Solution

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The answer is the first one: It converts organic carbon to inorganic carbon.

Explanation for each option:

  1. It converts organic carbon to inorganic carbon: This statement is NOT true. Photosynthesis actually converts inorganic carbon (in the form of carbon dioxide, CO₂) into organic carbon (in the form of glucose, C₆H₁₂O₆).

  2. It is an endergonic reaction: This statement is true. Photosynthesis requires an input of energy (from sunlight) to drive the reaction, making it an endergonic process.

  3. It is a redox reaction moving electrons from oxygen to carbon: This statement is true. Photosynthesis involves the reduction of carbon dioxide to glucose and the oxidation of water to oxygen, which involves the transfer of electrons.

  4. It converts light energy into chemical energy: This statement is true. Photosynthesis captures light energy and converts it into chemical energy stored in the bonds of glucose molecules.

  5. The Calvin cycle does not harvest light energy: This statement is true. The Calvin cycle, also known as the light-independent reactions or dark reactions, does not directly use light energy. Instead, it uses the chemical energy (ATP and NADPH) produced during the light-dependent reactions to fix carbon dioxide into glucose.

Summary: The statement "It converts organic carbon to inorganic carbon" is NOT true concerning photosynthesis.

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