Respiration Details PPT

Sunlight provides the energy that eventually becomes ATP in you!

Photosynthesis Respiration Inputs Outputs C6H12O6 + O2 CO2 + H2O + ATP Light + CO2 + H2O C6H12O6 + O2 Inputs Outputs C6H12O6 + O2 CO2 + H2O + ATP Respiration

Cellular Respiration

What’s ATP used for?

Glycolysis – In the cytosol Start with Glucose Uses 2 ATP’s Makes 4 ATP’s Makes 2 NADH’s Left with 2 pyruvates

Glycolysis - in the cytosol NOTICE THE SPLITTING HERE! EVERYTHING FOLLOWNG MUST BE MULTIPLIED BY 2!

Pyruvate to the mitochondria: “Link Step”

Kreb’s Cycle – in the mitochondrial matrix

Electron Transport Chain (detailed) Electron Transport Chain – virtual animation ATP synthase in mitochondria – virtual animation

End of notes Friday 11-13

Where do the electrons come from?

ATP synthase allows for chemiosmosis

Reactions in Respiration Inputs Outputs Glycolysis (cytoplasm) Glucose 2ATP 4ADP 2NAD+ Krebs Cycle (mitochondria) Pyruvate NAD+ CoA FAD ADP Glycolysis (Cytoplasm) 2ADP 4ATP 2NADH 2 pyruvate Krebs Cycle (mitochondria) NADH CO2 FADH2 ATP

Reactions in Respiration (cont.) Inputs Outputs Electron Transport Chain in mitochondria membrane NADH FADH2 O2 Electron Transport Chain in mitochondria membrane NAD+ FAD ATP H2O

Cellular Respiration Summary C6H12O6 + O2 CO2 + H2O + ATP 3 Basic Steps: Glycolysis (in the cytoplasm) Kreb’s Cycle (inner mitochondrial space) Electron Transport Chain (mitochondrial membrane) glucose pyruvate + ATP + NADH pyruvate NADH + FADH2 + ATP + CO2 NADH + FADH2 + O2 ATP + H20

Review – Big Picture

Control of Respiration … feedback systems Lots of AMP (low energy molecule) Stimulates enzyme to produce ATP Lots of ATP or Citrate Shuts down enzyme to prevent overproduction

No oxygen = anaerobic pathway Yeast/bacteria Produce ethanol when deprived of oxygen … still has some energy Humans Produce lactic acid when deprived of oxygen Recycled in liver to produce pyruvate

Anaerobic Respiration Without Oxygen No electron transport chain … less ATP 2 types: Alcoholic fermentation: (bacteria, yeast) Pyruvate + NADH Ethanol + NAD+ + CO2 Lactic Acid fermentation: (animals like you) Pyruvate + NADH Lactic Acid + NAD+ What’s different about these two equations? How can you set up an experiment to detect the difference?