Question

1. fill in each step of cellular respiration that occurs and the number of atp produced at each step.

a =
b =
c =

Explanation:

• Step A: Glycolysis occurs in the cytoplasm, breaking down glucose into pyruvate, producing 2 ATP (net) and NADH.
• Step B: The Krebs cycle (citric acid cycle) takes place in the mitochondrial matrix, using acetyl-CoA (from pyruvate oxidation) to generate 2 ATP, CO₂, and NADH/FADH₂.
• Step C: Oxidative phosphorylation (electron transport chain + chemiosmosis) occurs in the inner mitochondrial membrane, using NADH/FADH₂ to produce ~32-34 ATP (total ~36-38 ATP if including glycolysis and Krebs cycle).

Answer:

A = Glycolysis (net 2 ATP)
B = Krebs cycle (2 ATP)
C = Oxidative phosphorylation (~32-34 ATP)