Aerobic Cellular Respiration

Where do autotrophs get their food?

Where do heterotrophs (like you!) get their food?

How is the energy in food measured? In calories! (lower case ‘c’) A calorie is the amount of energy required to raise the temperature of one GRAM of water one degree Celsius The ‘calories’ you see on food labels are actually KILOcalories (‘upper case C) One C = 1,000 c

GLYCOLYSIS

Stage of Aerobic Cellular Respiration ATP Accounting: Stage of Aerobic Cellular Respiration ATP NADH (1 NADH  3 ATP FADH2 (1 FADH2  2 ATP Glycolysis 2 Oxidative decarboxylation Krebs cycle Electron transport chain TOTALS

Stage of Aerobic Cellular Respiration ATP Accounting: Stage of Aerobic Cellular Respiration ATP NADH (1 NADH  3 ATP FADH2 (1 FADH2  2 ATP Glycolysis 2 Oxidative decarboxylation Krebs cycle Electron transport chain TOTALS

KREBS CYCLE

Stage of Aerobic Cellular Respiration ATP NADH (1 NADH  3 ATP FADH2 (1 FADH2  2 ATP Glycolysis 2 Oxidative decarboxylation Krebs cycle 6 Electron transport chain TOTALS

Electron Transport Chain

What kind of cells have mitochondria?

Stage of Aerobic Cellular Respiration ATP NADH (1 NADH  3 ATP FADH2 (1 FADH2  2 ATP Glycolysis 2 Oxidative decarboxylation Krebs cycle 6 Electron transport chain 34 TOTALS 38 10

Anaerobic Respiration

Two types: Lactic acid fermentation

2. Alcoholic fermentation

What about other molecules we eat? Do they provide any energy? Proteins Lipids Nucleic acids

So, we’ve been talking about how organisms extract energy from glucose…..so….. WHERE DID THE ENERGY IN THE GLUCOSE COME FROM? And how did the sun’s energy get captured in glucose molecules?