Cellular Respiration Do Now: 1. Take out homework 2. What do you think “respiration” is? Is it the same as “cellular respiration?”

Cellular Respiration Is a complex biochemical pathway that breaks down chemicals in order to make ATP.

How ATP Works Adenine Ribose PPP ATP = stored Energy Energy to use ADP = used Energy (like a dead rechargeable battery) Think “D” = “D”ead. TRI phosphate DI phosphate Pi

There are two main types of respiration Aerobic respiration requires oxygen Anaerobic respiration does not require oxygen.

Cellular Respiration Overview Organic Compounds e.g. C 6 H 12 O 6 Glycosis Fermentation Citric Acid (Krebs) Cycle Electron Transport Chain Lactic Acid Ethanolic AnaerobicAerobic Chemiosmosis = # ATP made per glucose molecule

World Changing About 2.5 Billion years ago, life on Earth changed forever… Paleontologists mark this time as the change from the Archaen Era to the Proterozoic. About 90% of the species of organisms alive went extinct in a terrible catastrophe… What was it???

Photosynthesis Makes Oxygen! Aerobic respiration, made possible by photosynthesis, produces almost 2,000% more energy than anaerobic! That’s a lot of ATP! This allows for the diversification of life – and the rise of the Eukaryotes 1.8 BYA

Aerobic Respiration is what YOU (and other complex organisms) do.

Key Concepts Cellular Respiration How ATP works –ATP  ADP + P + Energy Aerobic Respiration –glycolysis  Citric Acid Cycle  Electron Transport Chain  Chemiosmosis Anaerobic Respiration –Glycolysis  Fermentation Aerobic respiration is almost 20x more efficient than anaerobic. –There’s a reason that there’s no such thing as a multicellular anaerobe.