Cellular Respiration II - Krebs cycle & Electron Transport

Cellular Respiration II - Krebs cycle & Electron Transport

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2. Krebs Cycle o Pyruvate  formed in glycolysis enters mitochondria from cytoplasm o Enzymes prepare pyruvate for entry into  Krebs Cycle o Converted to  acetyl CoA  before entry into Krebs Cycle o Enzymatic conversion of pyruvate accomplishes 3 things: 1. H+ stripped from pyruvate transferred to NAD+ to make  NADH 2. Co2 3. Remaining 2-carbon compound attached to coenzyme A (CoA) to form  acetyl  CoA o Two carbons enter cycle as  acetyl CoA o o Two carbons leave as Co2 o NAD+  pick up H+ to become 3  NADH o FAD  also picks up H+ to become  FADH2 o One  ATP  formed for each acetyl CoA cycled Total imputs: - one 2-carbon compound (acetyl CoA) - 3 NAD+ - one FAD - one ADP plus phosphate Total outputs: - 3 NADH - one FADH2 - one ATP - two Co2 Two turns of cycle for each glucose from glycolysis In what form does energy enter this pathway?
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Cellular Respiration II - Krebs cycle & Electron Transport

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