Cellular Respiration Glycolysis + Anaerobic or Aerobic Processes.

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Presentation transcript:

Cellular Respiration Glycolysis + Anaerobic or Aerobic Processes

Glycolysis First step of cellular respiration Occurs in the cytoplasm [Cytosol] Net Yield = 2 ATP What about the pyruvic acid?

If no oxygen…then Fermentation! Lactic Acid Fermentation Microorganisms (Bacteria) and Muscles Results in NAD + for glycolysis…

or Alcoholic Fermentation Some plant cells & unicellular organisms (yeast)

Glycolysis + Fermentation: Good News = Continued production of ATP Bad News = Only enough energy for unicellular and very small multicellular organisms * What is a more efficient process?

Glycolysis + Aerobic Respiration Must add oxygen!

Aerobic Respiration Produces nearly 20 times as much ATP as glycolsis alone Two Stages: 1.Krebs Cycle 2. Electron Transport Chain (w/ chemiosmosis)

Krebs Cycle (Citric Acid Cycle) Two “turns” breaks down the glucose and yields 2 ATP + CO 2 waste

Electron Transport Chain (+ Chemiosmosis) = 34 ATP!

Cellular Respiration

Cellular Respiration + Photosynthesis