A reaction proceeds A → B → C with the energy diagram shown. Which step has the LARGEST positive ΔG?
- A
A → C overall because reactions accumulate
- B
B → C because the products are higher in energy
- C
All steps have equal ΔG
- Dcheck_circle
A → B because ΔG is small or near zero (least exergonic)
Explanation
Each step has small or near-zero ΔG. A→B sees the smallest free-energy drop, so it's least favorable; the largest drop is between B and C, but the prompt asks for the LARGEST ΔG (most positive / least negative), so A→B fits.