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Multiple Choice
In the context of organic chemistry reactions, what is produced at the end of the second phase of the Calvin cycle?
A
Ribulose bisphosphate
B
Glyceraldehyde-3-phosphate (G3P)
C
Glucose
D
ATP
Verified step by step guidance
1
Understand that the Calvin cycle is a series of biochemical redox reactions that take place in the stroma of chloroplasts in photosynthetic organisms.
The Calvin cycle consists of three main phases: carbon fixation, reduction phase, and regeneration of ribulose bisphosphate (RuBP).
In the second phase, known as the reduction phase, 3-phosphoglycerate (3-PGA) molecules are converted into glyceraldehyde-3-phosphate (G3P) using ATP and NADPH.
Recognize that during this reduction phase, ATP provides the energy, and NADPH provides the reducing power needed to convert 3-PGA into G3P.
Conclude that at the end of the second phase of the Calvin cycle, the primary product is glyceraldehyde-3-phosphate (G3P), which can be used to form glucose and other carbohydrates.