AP Biology Unit 3: PS & CR

Photosynthesis goal is to

• convert light energy into glucose energy

• use light energy to make oxygen gas

• convert sugar energy into ATP

• convert sugar energy into oxygen gas

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Rubisco is important in which step of photosynthesis

• energizing the electrons in chlorophyll

• carbon fixation when CO2 is connected to RUBP during calvin cycle

• regeneration phase as RUBP is made during calvin cycle

• reduction of the carbon chain during the calvin cycle

If the proton (H+) pump in the thylakoid was not working which molecule could not be made during the light reaction?

• NADPH

• ATP

• Water

• Oxygen gas

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The NADP+ is

• oxidized during the light reaction

• reduced during the light reaction

• oxidized during the Calvin cycle

• reduced during the Calvin cycle

What is FALSE about the calvin cycle

• uses the light reactions products

• produces a three carbon sugar (G3P)

• produces carbon dioxide

• produces NADP+

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What is the function of NADP+?

• It absorbs light
• It is an electron carrier
• It is a light-reflecting pigment
• It acts as long-term energy storage

Green plants reflect ________ light.

• Red
• Green
• All
• Red and Violet

Which of the following is NOT a product of the light reactions?

• ATP
• NADPH
• Oxygen
• Glucose

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Where do the dark reactions (Calvin cycle) take place?

• thylakoid membrane

• lumen

• stroma

How are cellular respiration and photosynthesis related, in terms of energy?

• The energy captured in photosynthesis is used to power cellular respiration.
• The energy transformed in cellular respiration is used to power photosynthesis.
• Photosynthesis and respiration perform the same task in terms of energy transformation
• Energy is not involved in either photosynthesis or cellular respiration.

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