The Calvin Cycle

What is the role of NADPH in the Calvin Cycle?

• NADPH provides the reducing power needed to convert 3-PGA into G3P during the Calvin Cycle.

• NADPH is used to transport oxygen in the Calvin Cycle.

• NADPH acts as a catalyst for the reaction in the Calvin Cycle.

• NADPH is involved in the synthesis of glucose from carbon dioxide.

What is RuBP?

• A 5-carbon sugar that combines with carbon dioxide in the Calvin Cycle

• A type of enzyme involved in photosynthesis

• A molecule that stores energy in plants

• A 6-carbon sugar produced during glycolysis

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Why is the Calvin Cycle also called the dark reactions?

• Because it requires light to occur

• Because it can occur in the dark as long as ATP and NADPH are available

• Because it only happens at night

• Because it is a part of the light reactions

What is the Calvin Cycle?

• A process where glucose is broken down for energy in mitochondria.

• A series of biochemical reactions in the stroma of chloroplasts that convert carbon dioxide into glucose using ATP and NADPH.

• A method of nitrogen fixation in legumes.

• A type of cellular respiration that occurs in anaerobic conditions.

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How many carbon dioxide molecules are required to produce one glucose molecule in the Calvin Cycle?

• Four carbon dioxide molecules

• Five carbon dioxide molecules

• Six carbon dioxide molecules

• Seven carbon dioxide molecules

What effect do high temperatures have on the Calvin Cycle?

• High temperatures can speed up the Calvin Cycle by increasing enzyme activity.

• High temperatures can slow down the Calvin Cycle because they can denature enzymes involved in the process.

• High temperatures have no effect on the Calvin Cycle.

• High temperatures enhance the production of glucose in the Calvin Cycle.

What is the significance of ATP in the Calvin Cycle?

• ATP is used to transport glucose out of the chloroplasts.

• ATP provides the energy required for the conversion of 3-PGA into G3P and for the regeneration of RuBP.

• ATP is involved in the synthesis of chlorophyll.

• ATP is a byproduct of the Calvin Cycle.

How many ATP molecules are used in the Calvin Cycle to regenerate RuBP?

• One ATP molecule

• Two ATP molecules

• Three ATP molecules

• Four ATP molecules

What is the relationship between the light-dependent reactions and the Calvin Cycle?

• The light-dependent reactions produce glucose, which is used in the Calvin Cycle to generate ATP.

• The light-dependent reactions produce ATP and NADPH, which are used in the Calvin Cycle to convert carbon dioxide into glucose.

• The Calvin Cycle occurs in the mitochondria, while the light-dependent reactions occur in the chloroplasts.

• The light-dependent reactions and the Calvin Cycle are two separate processes that do not interact.

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What role does G3P play in the Calvin Cycle?

• G3P is a 3-carbon sugar that can be used to form glucose and regenerate RuBP.

• G3P is a byproduct of cellular respiration.

• G3P is a type of enzyme that catalyzes reactions in the Calvin Cycle.

• G3P is a pigment that absorbs light energy for photosynthesis.

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