Chapter 8 Harvesting Energy: Glycolysis and Cellular ...

[Pages:30]Chapter 8 Harvesting Energy: Glycolysis and Cellular Respiration

Chapter 8: Glycolysis and Cellular Respiration

What is Glucose Metabolism?

Answer: The breakdown of glucose to release energy from its chemical bonds

Photosynthesis:

6 CO2

+ 6 H2O

+

Light Energy

= C6H12O6

+ 6 O2

Carbon Dioxide

Water

Glucose

Oxygen

Glucose Metabolism:

C6H12O6 + 6 O2 = 6 CO2 + 6 H2O + Energy

Glucose

Oxygen

Carbon Dioxide

Water

Chemical Heat

Chapter 8: Glycolysis and Cellular Respiration

Major Steps of Glucose Metabolism

Mitochondria

Glucose

Cytoplasm 1) Glycolysis (2 ATP)

Oxygen present (Aerobic)

Pyruvate

(36 ATP) 3) Cellular Respiration

No oxygen present (Anaerobic)

2) Fermentation

Carbon Dioxide Water

Ethanol Lactate

Major Steps in Glucose Metabolism:

(Figure 8.1)

Chapter 8: Glycolysis and Cellular Respiration

1) Glycolysis (Greek: "To break down a sweet") ? Ancient biochemical pathway (all organisms do it...) ? Occurs in the cytoplasm; Does not require oxygen

Two Major Components: A) Glucose Activation: Initiate the reaction (takes energy)

2 ATP

2 ADP

CCCCCC

Glucose

(Activation Energy)

C C C x2 P

Glyceraldehyde 3-phosphate (G3P)

Chapter 8: Glycolysis and Cellular Respiration

1) Glycolysis (Greek: "To break down a sweet") ? Ancient biochemical pathway (all organisms do it...) ? Occurs in the cytoplasm; Does not require oxygen

Two Major Components: A) Glucose Activation: Initiate the reaction (takes energy) B) Energy Harvesting: Complete the reaction (makes energy)

4 ADP

C C C x2 P

Glyceraldehyde 3-phosphate

2 NAD+

4 ATP 2 NADH

C C C x2

Pyruvate

Glycolysis in Review:

(Figure 8.2)

Net ATP Gain = 2 ATP

Chapter 8: Glycolysis and Cellular Respiration

Major Steps of Glucose Metabolism

Glucose

1) Glycolysis (2 ATP)

Oxygen present (Aerobic)

Pyruvate

(36 ATP) 3) Cellular Respiration

No oxygen present (Anaerobic)

2) Fermentation

Carbon Dioxide Water

Ethanol Lactate

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download