Unit 4: Respiration and Gas Exchange

Question 1

What is respiration

Answer 1

Respiration is the process of transferring energy from glucose, which happens constantly in every living cell

Question 2

What is aerobic respiration

Answer 2

Aerobic respiration occurs when there is plenty of oxygen available

Question 3

How much ATP does aerobic respiration produce

Answer 3

32 molecules per molecules of glucose

Question 4

What is the word and chemical equation for aerobic respiration

Answer 4

• Glucose + oxygen —> carbon dioxide + water (+ energy)
• C6H12O6 + 6O2 —> 6CO2 + 6H2O

Question 5

What is anaerobic respiration

Answer 5

Occurs when there is a lack of oxygen

Question 6

What is the word equation for anaerobic respiration

Answer 6

Glucose —> lactic acid (+ energy)

Question 7

What is thr word equation for anaerobic respiration in plants

Answer 7

glucose —> ethanol + carbon dioxide (+ energy)

Question 8

What indicator can you use to test for respiration in plants and what colour change occurs

Answer 8

• Hydrogen-carbon indicator
• Turns yellow when more CO2 is present
• Turns purple when CO2 decreases
• Stays orange if concentration of CO2 is the same

Question 9

How does gas exchange occure in plants

Answer 9

By diffusion