4. Learning Outcomes
Chapter 6
• Explain how cells use energy in food to produce ATP.
• Draw and explain the net reaction in aerobic respiration.
• Compare and contrast the events of glycolysis, the Krebs cycle, and the electron
transport chain.
• Describe where in a eukaryotic cell each step in respiration occurs.
• Draw and explain the net reaction in glycolysis.
• Draw and explain the net reaction in the Krebs cycle.
• Diagram and explain the flow of electrons in the electron transport chain.
• Explain the role of O2 in respiration.
• Explain what would happen in each part of cellular respiration if the cell is deprived of
O2.
• Explain why fermentation is necessary in O2 deprived cells. Compare and contrast
aerobic respiration, anaerobic respiration, and fermentation.
• Compare and contrast respiration and photosynthesis.
• Explain the evolutionary links between respiration and photosynthesis.
7. Figure 6.16
One glucose
molecule
(from food)
Cell Mitochondrion
Glucose
Glycolysis
(in cytosol)
Krebs cycle
(in mitochondrial
matrix)
Electron transport
chain (in inner
mitochondrial
membrane)
Total ATP yield from
one glucose molecule:
Grand total (theoretical yield): 36
-2
38
2 2 34
CO2
O2
6
+ 6
ATP ATP ATP
ATP
ATP
ATP
13. Glycolysis
2 Pyruvate
2
2
6
2
6 6
34
2
4
2
2 Acetyl CoA
Transition step
Krebs
cycle
Electron
transport
chain
Glucose
2
Cytosol
Mitochondrion
NADH
NADH
NADH
FADH2
ATP
ATP
ATP
CO2
CO2
H2OO2
Step by Step
1. Glycolysis
(Transition Step) Acetyl Co-A
production
2. Krebs Cycle
3. Electron Transport Chain