What is the Initial Carbon-Containing Starting Product in the Calvin

Question

What is the initial carbon-containing starting product in the Calvin cycle?
A) glyceraldehyde 3-phosphate
B) glucose
C) ribulose bisphosphate
D) rubisco

Accepted Answer

The initial carbon-containing starting product in the Calvin cycle is ribulose bisphosphate (RuBP), which is a 5-carbon sugar that reacts with CO2 to form two molecules of 3-phosphoglycerate (3-PGA). This reaction is catalyzed by the enzyme rubisco. Glyceraldehyde 3-phosphate (G3P) is a product of the Calvin cycle, not a starting product. Glucose is a product of photosynthesis, but not a starting product of the Calvin cycle. Rubisco is an enzyme involved in the Calvin cycle, but not a starting product.