C 6 H 12 O 6 + 6 O 2 → 6 CO 2 + 6 H 2 O + 2808 kJ Respiration- exothermic or endothermic? In th body- the energy is released in several steps usin adenosine.

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C 6 H 12 O O 2 → 6 CO H 2 O kJ Respiration- exothermic or endothermic? In th body- the energy is released in several steps usin adenosine triphopshate, ATP Which reaction type? Draw half reactions. What is oxidized/reduced?

Adenosine triphosphate ATP

Glucose is transported by the blood to all cells in the body Glucose is degraded in the cytoplasm to pyruvic acid, pyruvate (glycolysis) Glucose + O 2 pyruvate + 2 H 2 O The pyruvate is degraded to CO 2 in the mitocondriae (krebs cycle) 2 pyruvate + 5 O 2 6 CO 2 + 6H 2 O

Aerobic or anaerobic?

Krebs cycle (not required)

Cytochromes- enzymes in the respiration chain

Redox reactions with cytochromes C 6 H 12 O H 2 O 6 CO H e - O H e - 2 H 2 O Fe 3+ + e - Fe 2+ Cu 2+ + e - Cu + ox red

Haem group in haemoglobin Poisoned by CO and CN -

Haem and cytochrome c oxidase are prostetic groups in the respiratory enzyme