cellular respiration

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Last updated 1:02 AM on 10/11/26
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10 Terms

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Formula

6O2 + Glucose (C6H12O6) → 6CO2 + 6H2O + Energy (ATP)

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Energy Status

Exergonic

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Formula Redox Reactions

Glucose: Oxidized

Oxygen: Reduced (O has has electron affinity)

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4 Stages

  1. Glycolysis

  2. Pyruvate Oxidation

  3. Citric Acid Cycle/Krebs Cycle

  4. Oxidative Phosphorylation


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ALL stages EXCEPT glycolysis use

aerobic respiration

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Glycolysis

Cytoplasm
6C to 2 3C’s (G3P) using ATP
G3P oxidized (NADH, ATP) —> Pyruvates

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Pyruvate Oxidation

Mitochondria

Pyruvates (3C) loses 1C —> CO2, NADH
2C+CoA —> Acetyl CoA’s

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Citric Acid Cycle

Mitochondrial Matrix

2 Acetyl-CoA - CoA = 2C

2C + 4C (Oxa) = 6C (Citrate)

6C (Citrate) - 2C = CO2, NADH

+1 ATP

4C - (e- + H+) → FADH2

4C → 4C (Oxa)

+1 NADH

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Oxidative Phosphorylation

Inner Mitochondrial Matrix

NADH + FADH2 → NAD+ + FAD

e- → ETC 

H+ pumped → Intermembrane Space → H+ gradient

e- lose energy → O2 accepts them 

e- + H+ = H2O

H+ ions + ATP Synthase → Facilitated Diffusion

1 ATP Synthase spin = ADP+P → 1 ATP

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Glycolysis Reactions

  1. Energy Investment: Endergonic

    1. Energy Payoff: Exergonic