Calvin Cycle Flashcards
What is the primary function of the Calvin cycle?
To convert carbon dioxide into glucose using ATP and NADPH.
True or False: The Calvin cycle occurs in the chloroplasts of plant cells.
True.
Fill in the blank: The Calvin cycle is also known as the ________ phase of photosynthesis.
light-independent.
What are the three main stages of the Calvin cycle?
Carbon fixation, reduction phase, and regeneration of ribulose bisphosphate.
Which enzyme catalyzes the first step of the Calvin cycle?
Ribulose bisphosphate carboxylase/oxygenase (RuBisCO).
What is the initial carbon compound formed during carbon fixation?
3-phosphoglycerate (3-PGA).
How many molecules of ATP are consumed in the reduction phase of the Calvin cycle?
6 molecules of ATP.
Multiple Choice: Which of the following is NOT a product of the Calvin cycle? A) Glucose B) ATP C) NADP+ D) NADPH
C) NADP+.
What is the role of NADPH in the Calvin cycle?
To provide reducing power for the conversion of 3-PGA to glyceraldehyde-3-phosphate (G3P).
True or False: The Calvin cycle requires sunlight directly to occur.
False.
How many molecules of carbon dioxide are needed to produce one molecule of glucose in the Calvin cycle?
Six molecules of carbon dioxide.
What is the final product of the Calvin cycle that can be used to form glucose?
Glyceraldehyde-3-phosphate (G3P).
Fill in the blank: The regeneration phase of the Calvin cycle produces ________.
ribulose bisphosphate (RuBP).
What is the significance of the enzyme RuBisCO in the Calvin cycle?
It catalyzes the reaction that incorporates carbon dioxide into organic molecules.
Multiple Choice: Which phase of the Calvin cycle consumes ATP? A) Carbon fixation B) Reduction C) Regeneration
B) Reduction.
What is the chemical equation that summarizes the Calvin cycle?
6 CO2 + 18 ATP + 12 NADPH → C6H12O6 + 18 ADP + 18 Pi + 12 NADP+.
What is the main carbohydrate produced in the Calvin cycle?
Glucose.
True or False: The Calvin cycle can occur both day and night.
True.
How many turns of the Calvin cycle are required to produce one molecule of glucose?
Six turns.
What are the two main products of the light-dependent reactions that are used in the Calvin cycle?
ATP and NADPH.
Fill in the blank: The Calvin cycle is also known as the ________.
C3 cycle.
Multiple Choice: What is the primary carbon source for the Calvin cycle? A) Oxygen B) Glucose C) Carbon Dioxide D) Water
C) Carbon Dioxide.
What molecule is regenerated at the end of the Calvin cycle to continue the process?
Ribulose bisphosphate (RuBP).
True or False: The Calvin cycle directly produces ATP.
False.
What happens to the glyceraldehyde-3-phosphate (G3P) molecules produced in the Calvin cycle?
They can be used to form glucose or other carbohydrates.
How does the Calvin cycle contribute to plant growth?
By synthesizing glucose, which serves as an energy source and building block for growth.
