Cell Bio - Aerobic Respiration

Question 1

What is respiration and what is it used for in mammals?

Answer 1

• Cellular process of releasing energy from food through a series of enzyme-controlled reactions
• Mammals need to release heat energy from food to keep their body temperature close to the optimum temperature for their enzymes to work.

Question 2

Name the two types of respiration

Answer 2

• Aerobic Respiration (presence of oxygen)
• Fermentation (absence of oxygen)

Question 3

• What is the word equation for AEROBIC RESPIRATION?
• How much ATP is produced from aerobic respiration?

Answer 3

glucose + oxygen → carbon dioxide + energy + water
* a lot (38 molecules, 2 from stage 1, 36 from stage 2

Question 4

Explain the process of aerobic respiration

Answer 4

S1: Occurs in Cytoplasm

• Glucose is broken down to 2 molecules of pyruvate = releases enough energy to make 2 molecules of ATP. (no oxygen needed)

S2: Occurs in Mitochondria

• A pyruvate molecule enters the mitochondria, makes carbon dioxide and water
• releases enough energy to make lots (36 molecules) of ATP. (oxygen needed)

total ATP made = 38 molecules