Calvin Cycle Flashcards
What is the first step in the Calvin cycle?
Carbon dioxide is combined with ribulose bisphosphate (RuBP) to form two molecules of glycerate 3-phosphate (GP)
This reaction is catalyzed by the enzyme RUBISCO.
What is the role of RUBISCO in the Calvin cycle?
RUBISCO catalyzes the reaction between carbon dioxide and ribulose bisphosphate (RuBP)
This forms an unstable 6-carbon compound that quickly breaks down into two molecules of GP.
How many carbons are in ribulose bisphosphate (RuBP)?
5 carbons
What is produced from the hydrolysis of ATP in the Calvin cycle?
Energy to convert glycerate 3-phosphate (GP) into glyceraldehyde 3-phosphate (GALP)
This process also requires H+ ions from reduced NADP.
What happens to reduced NADP in the Calvin cycle?
It is recycled to NADP
What do two molecules of GALP produce?
A hexose sugar, such as glucose
What is the main purpose of regenerating RuBP in the Calvin cycle?
To allow the cycle to continue processing carbon dioxide
This uses the rest of the ATP produced by the light-dependent reaction.
What are the essential biological molecules produced from the Calvin cycle?
- Carbohydrates
- Lipids
- Amino acids
- Nucleic acids
What is the significance of glucose produced in the Calvin cycle?
It is used in respiration, providing energy for biological processes
Fill in the blank: Glycerol used in lipid synthesis is synthesized from _______.
GALP
True or False: All GALP produced in the Calvin cycle is used to make hexose sugars.
False
Five out of every six molecules of GALP are used to regenerate RuBP.
What are polysaccharides made from in the Calvin cycle?
Joining hexose sugars together in different ways
What amino acids are made from in the Calvin cycle?
Glycerate 3-phosphate (GP)
What sugar in RNA is made using GALP?
Ribose
