Harvesting energy: photosynthesis & cellular respiration Chapter 4

Cellular respiration

Cellular respiration summary equation C6H12O6 + 6 O2  6 CO2 + 6 H2O many steps, many enzymes

Cellular respiration (3 steps) Making ATP with oxygen Cellular respiration (3 steps) 1. Glycolysis 2. Krebs cycle 3. Mitochondrial e- transport chain

Step 1: Glycolysis

Step 2: Krebs cycle In the mitochondrial matrix

Step 3: mitochondrial ETC

Cellular respiration - know this:

Animals extract energy & other valuable chemicals from molecules other than the simple sugar glucose

Making ATP without oxygen Fermentation

Two kinds of fermentation Lactic acid fermentation Alcohol fermentation

Photosynthesis, the big picture

Photosynthesis summary equation 6 CO2 + 6 H2O  C6H12O6 + 6O2 many steps, many enzymes

Chloroplasts: site of photosynthesis Chloroplasts have two parts thylakoids: stroma:

How photosynthesis & cellular respiration are linked

Photosynthesis - know this:

Also be able to answer these questions Where does the CO2 come from? What about the H2O? Why is O2 made? What is it for? What is the sugar for?