Chapter 7 - Photosynthesis Quiz

Which organisms are capable of producing their own food and are thus called autotrophs?

• Heterotrophs

• Photoautotrophs

• Producers

• Consumers

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What is the main role of chloroplasts in the leaves of plants?

• To convert light energy into chemical energy

• To produce carbon dioxide

• To release oxygen as a byproduct

• To absorb nutrients from the soil

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What is the primary source of oxygen produced during photosynthesis?

• Cellular respiration

• The Calvin cycle

• Light reactions

• Redox reactions

Which process is responsible for converting CO₂ to sugar in plants?

• The light reactions

• The Calvin cycle

• Electron transport chain

• Photophosphorylation

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What is the significance of the greenhouse effect in relation to climate change?

• It decreases global temperatures

• It has no impact on climate change

• It contributes to the warming of the Earth's atmosphere

• It reduces the amount of CO2 in the atmosphere

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What is the role of chlorophyll in photosynthesis?

• It is a type of electromagnetic energy.

• It is a light-absorbing pigment that converts solar energy to chemical energy.

• It is a fluid that surrounds chloroplasts.

• It is a stack of membranes in chloroplasts.

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NGSS.HS-LS1-5

Which of the following best describes heterotrophs?

• Organisms that produce their own food using light energy.

• Organisms that consume food produced by photoautotrophs.

• Organisms that absorb pigments to convert energy.

• Organisms that are surrounded by a double membrane.

What is the primary function of the Calvin cycle in photosynthesis?

• To oxidize water and reduce carbon dioxide.

• To capture solar energy.

• To incorporate CO₂ into organic compounds.

• To produce oxygen as a byproduct.

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Where do the light reactions occur in the chloroplasts?

• In the stroma.

• In the thylakoids.

• In the chlorophyll.

• In the photoautotrophs.

What is the role of a primary electron acceptor in the photosystems of the thylakoid membranes?

• It captures solar energy directly from sunlight.

• It synthesizes ATP and NADPH.

• It receives photoexcited electrons from reaction-center chlorophyll a.

• It functions in photoprotection from excessive light.