5- aerobic respiration

Question 1

label

Answer 1

Question 2

respiration

Answer 2

• The controlled breakdown of complex organic molecules (e.g. carbohydrates).
• It releases energy, which is used to make ATP (a source of energy for metabolic reactions).
• It generates heat, as some energy is lost in the form of heat.

Question 3

stages of aerobic respiration

Answer 3

• Glycolysis.
• Link reaction.
• Krebs cycle.
• Electron transport chain → oxidative phosphorylation.

Question 4

overall products from aerobic respiration

Answer 4

• 36-38x ATP:
- 2x ATP from glycolysis.
- 2x ATP from the Krebs cycle.
- 32-34x ATP from oxidative phosphorylation.
• 6x CO2:
- 2x CO2 from the link reaction (conversion of pyruvate to acetyl
CoA).
- 4x CO2 from the Krebs cycle.
• 6x water:
- 6x water from oxidative phosphorylation (when oxygen is reduced).