Key Differences in Cellular Respiration — NEET Biology
✅ Asked in NEET 2026Differentiate 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.
Match List-I (Process) with List-II (Location) — A. Glycolysis, B. ETS, C. Accumulation of protons, D. Krebs cycle.
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