Introduction to Cellular Respiration

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Presentation transcript:

Introduction to Cellular Respiration pp 131-135

6O2 + C6H12O6 → 6CO2+ 6 H2O + energy

Path is determined by presence of oxygen If O2 is absent then anaerobic respiration occurs in the cytoplasm If O2 is present then aerobic respiration occurs in the mitochondrion

(with oxygen) (without oxygen) aerobic stage anaerobic stage (with oxygen) (without oxygen)

Anaerobic Stage (no O2): begins with glycolysis

Glycolysis Occurs in cytoplasm near mitochondria Results in 2 molecules of ATP and 2 molecules of NADH Glucose  2 Pyruvic acids (pyruvate)

Glucose  Pyruvic acid ethyl alcohol/ Fermentation Glucose  Pyruvic acid ethyl alcohol/ lactic acid alcoholic fermentation: conversion to ethyl alcohol + 2 ATP (yeast) Lactic acid fermentation: conversion to lactic acid + 2 ATP (muscles)