Photosynthesis

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water.

Front

What are the two main stages of photosynthesis?

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The two main stages of photosynthesis are the light-dependent reactions and the Calvin Cycle (light-independent reactions).

Front

What is the role of chlorophyll in photosynthesis?

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Chlorophyll is a pigment found in plants that absorbs light energy, primarily from the blue and red wavelengths, which is essential for the light-dependent reactions.

Front

What is NADPH and its role in photosynthesis?

Back

NADPH is a carrier molecule that transports high-energy electrons and is produced during the light-dependent reactions; it is used in the Calvin Cycle to help convert carbon dioxide into glucose.

Front

What is the function of ATP in photosynthesis?

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ATP (adenosine triphosphate) provides the energy required for various biochemical reactions in the Calvin Cycle, including the conversion of 3-PGA into G3P.

Front

What is the Calvin Cycle?

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The Calvin Cycle is a series of biochemical reactions that occur in the stroma of chloroplasts, where carbon dioxide is fixed and converted into glucose using ATP and NADPH.

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Why do plants need water for photosynthesis?

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Plants split water molecules during the light-dependent reactions to obtain electrons, which are essential for the production of NADPH and ATP.

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What is the significance of oxygen produced during photosynthesis?

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Oxygen is a byproduct of photosynthesis, produced when water is split during the light-dependent reactions; it is essential for the survival of aerobic organisms.

Front

What is the primary purpose of light-dependent reactions?

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The primary purpose of light-dependent reactions is to convert light energy into chemical energy in the form of ATP and NADPH.

Front

What is the role of carbon dioxide in photosynthesis?

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Carbon dioxide is a reactant in the Calvin Cycle, where it is fixed and converted into glucose.