Question

what is this pathway?
a electron transport chain
b calvin cycle
c fermentation
d glycolysis
e kreb cycle

Explanation:

• Electron Transport Chain: Involves electron transfer and ATP synthesis via a proton gradient, not directly related to PEP - pyruvate conversion.
• Calvin cycle: Occurs in photosynthesis for carbon fixation, not relevant here.
• Fermentation: Follows glycolysis (in anaerobic conditions) but the key step shown (PEP to pyruvate with ATP formation) is part of glycolysis.
• Glycolysis: The pathway where PEP (phosphoenolpyruvate) is converted to pyruvate, and during this conversion, ADP is phosphorylated to ATP (substrate - level phosphorylation).
• Kreb cycle: Occurs after glycolysis (after pyruvate is converted to acetyl - CoA), not directly related to the PEP - pyruvate step.

Answer:

D. Glycolysis