Plant Physiology - Photosynthesis

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Q1. What is the role of NADP+ in photosynthesis? (2021)

Solution:

NADP+ acts as an electron carrier, becoming reduced to NADPH during the light-dependent reactions.

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Q2. What is the primary source of energy for photosynthesis? (2023)

Solution:

Solar energy is the primary source of energy for photosynthesis, driving the process.

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Q3. Which of the following wavelengths of light is least effective for photosynthesis? (2020)

Solution:

Green light is least effective for photosynthesis because it is mostly reflected by chlorophyll.

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Q4. What is the significance of the light-independent reactions? (2023)

Solution:

The light-independent reactions, also known as the Calvin cycle, fix carbon dioxide into organic molecules.

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Q5. What is the function of stomata in plants? (2019)

Solution:

Stomata are small openings on leaves that facilitate gas exchange, allowing CO2 in and O2 out.

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Q6. What is the function of NADP+ in photosynthesis? (2019)

Solution:

NADP+ acts as an electron carrier, becoming NADPH during the light-dependent reactions.

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Q7. What is the significance of the light-harvesting complexes in photosynthesis? (2019)

Solution:

Light-harvesting complexes absorb light energy and transfer it to the reaction center in photosystems.

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Q8. Which gas is a byproduct of photosynthesis? (2023)

Solution:

Oxygen is released as a byproduct of photosynthesis during the light-dependent reactions.

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Q9. Which of the following processes occurs during the light-dependent reactions of photosynthesis? (2020)

Solution:

Photolysis of water occurs during the light-dependent reactions, producing oxygen and electrons.

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Q10. Which of the following processes occurs in the thylakoid membranes of chloroplasts? (2020)

Solution:

The light-dependent reactions of photosynthesis occur in the thylakoid membranes.