Key Differences in Cellular Respiration — NEET Biology
✅ Asked in NEET 2026Match List-I (Process) with List-II (Location) — A. Glycolysis, B. ETS, C. Accumulation of protons, D. Krebs cycle.
Match List-I (Process) with List-II (Location) — A. Glycolysis, B. ETS, C. Accumulation of protons, D. Krebs cycle.
Answer & NCERT explanation
Correct answer: C — A-III, B-I, C-IV, D-II
Glycolysis occurs in the cytoplasm; the ETS is on the inner mitochondrial membrane; protons accumulate in the intermembrane space; Krebs cycle takes place in the mitochondrial matrix.
Read more NCERT concept on the PYQ
Differentiate between (a) Respiration and Combustion (b) Glycolysis and Krebs' cycle (c) Aerobic respiration and Fermentation
NTA tests whether students can distinguish between respiration types: respiration is controlled, enzyme-regulated energy release in cells; combustion is rapid, uncontrolled burning producing heat and light. Within respiration, glycolysis (10-step glucose breakdown in cytoplasm, producing 2 ATP) differs from Krebs' cycle (acetyl-CoA oxidation in mitochondria, producing NADH/FADH₂). Aerobic respiration requires oxygen and produces ~38 ATP per glucose; fermentation lacks oxygen, regenerates NAD+, and yields only 2 ATP. Common mistake: students confuse glycolysis location or forget that fermentation still includes glycolysis. Remember: glycolysis is universal and happens first in all pathways; the divergence occurs after pyruvate formation depending on oxygen availability.
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