Aerobic Respiration

Chapter 3.2McGraw-Hill Ryerson

Biology 12 (2011)

Aerobic Respiration

• Aerobic Respiration: catabolic pathways that require oxygen

• Anaerobic respiration: catabolic pathways that exclude oxygen

You are going to learn all of thisRefer to pg 123 for a

summarized table

Refer to section 3.2 frequently to ensure knowledge of material

Glycolysis: Be sure to refer to pg 124-125

Pyruvate Oxiation: Refer to pg 126

• Krebs Cycle: Refer to pg 126-127

Oxidative Phosphorylation: Pg 128

Summary of Aerobic Respiration• Refer to pg 130Glycolysis

- Happens in cytoplasm- Yields 2 net ATP, and 2 NADH (but must enter mitochondria)

Pyruvate Oxidation- Pyruvate is oxidized into acetyl-CoA and CO2 is released

- Pyruvate molecules move from cytoplasm into mitrochondrion- NADH is formed per pyruvate (so 2 since 1 glucose can make 2 pyruvates)

Krebs Cycle- Happens in Mitochondrial matrix- Yields 1 ATP per acetyl-CoA (2 acetyl-CoA is made from 1 glucose molecule)- 2 CO2 molecules released per acetyl-CoA (Thus 4 is released from 2 acetyl-CoA)

- 3 NADH + 1 FADH2 released per acetyl-CoA (Thus 6 NADH and 2 FADH2 from 2 acetyl-CoA)

Oxidative Phosphorylation- Happens in mitochondria and involves inner mitochondrial membrane- Uses the NADHs and FADH2s to form ATP molecules (3 per NADH, 2 per FADH2)

*NADH from glycolysis must cross mitochondrial membrane in eukaryotes and thus is converted into FADH2

Homework

• Pg. 133 #1, 4 - 8, 11, 12