Photosynthesis—Calvin Cycle Flashcards
What is the main purpose of the Calvin cycle in photosynthesis?
To convert carbon dioxide into glucose using ATP and NADPH.
True or False: The Calvin cycle occurs in the chloroplasts of plant cells.
True
What are the three main stages of the Calvin cycle?
Carbon fixation, reduction phase, and regeneration of RuBP.
Fill in the blank: The enzyme __________ catalyzes the first step of the Calvin cycle.
RuBisCO
What molecule is fixed during the carbon fixation stage of the Calvin cycle?
Carbon dioxide (CO2)
Multiple choice: Which of the following is a product of the Calvin cycle? A) Glucose B) Oxygen C) Carbon Dioxide D) ATP
A) Glucose
What is the role of ATP in the Calvin cycle?
ATP provides energy for the conversion of 3-PGA to G3P.
What is the role of NADPH in the Calvin cycle?
NADPH provides reducing power to convert 3-PGA into G3P.
True or False: The Calvin cycle does not require light directly.
True
What is the final product of the Calvin cycle that can be used to form glucose?
Glyceraldehyde-3-phosphate (G3P)
How many molecules of CO2 are required to produce one molecule of G3P in the Calvin cycle?
Three molecules of CO2.
Fill in the blank: The sugar produced in the Calvin cycle can be used to form __________.
Glucose
Multiple choice: What is the main function of RuBP in the Calvin cycle? A) Store energy B) Accept CO2 C) Produce ATP D) Generate NADPH
B) Accept CO2
What happens to G3P after it is produced in the Calvin cycle?
It can be converted into glucose or other carbohydrates.
True or False: The Calvin cycle occurs in the stroma of chloroplasts.
True
What is the primary source of energy for the Calvin cycle?
ATP from the light-dependent reactions.
How many turns of the Calvin cycle are needed to produce one glucose molecule?
Six turns.
What is 3-PGA and its role in the Calvin cycle?
3-Phosphoglycerate (3-PGA) is the first stable product formed after CO2 fixation.
True or False: The Calvin cycle can occur without the light-dependent reactions.
False
What happens during the regeneration phase of the Calvin cycle?
RuBP is regenerated to continue the cycle.
Multiple choice: Which of the following is NOT a phase of the Calvin cycle? A) Carbon fixation B) Reduction phase C) Regeneration phase D) Light reaction
D) Light reaction
What is the significance of the Calvin cycle in the global carbon cycle?
It helps convert atmospheric CO2 into organic compounds.
Fill in the blank: The Calvin cycle is also known as the __________ pathway.
C3
What is the primary molecule that enters the Calvin cycle?
Carbon dioxide (CO2)
