Energy and 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?

Back

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

Front

Where do light-dependent reactions occur?

Back

Light-dependent reactions occur in the thylakoid membranes of chloroplasts.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll is the primary pigment that absorbs light energy, primarily in the blue and red wavelengths, and converts it into chemical energy.

Front

What are the products of light-dependent reactions?

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The products of light-dependent reactions are ATP, NADPH, and oxygen.

Front

What is the function of NADP+ in photosynthesis?

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NADP+ acts as an electron carrier that accepts high-energy electrons from chlorophyll and transports them to the light-independent reactions.

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, using ATP and NADPH to convert carbon dioxide into glucose.

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What is the significance of the light-independent reactions?

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Light-independent reactions (Calvin cycle) are significant because they use the energy stored in ATP and NADPH to synthesize glucose from carbon dioxide.

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What is the equation for photosynthesis?

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The equation for photosynthesis is: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2.

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What is the role of water in photosynthesis?

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Water provides electrons and protons for the light-dependent reactions and is split to release oxygen as a byproduct.