B1.3.3 Anaerobic Respiration

Question 1

Word equation for anaerobic respiration

Answer 1

Glucose -> lactic acid

Question 2

What is oxygen debt?

Answer 2

-The extra oxygen you inhale reacts with the lactic acid, breaking it down.
-The oxygen needed for this process is called the oxygen debt.

Question 3

What is fermentation

Answer 3

Anaerobic respiration in microorganisms and other plant cells that produces ethanol and carbon dioxide.

Question 4

Fermentation word equation

Answer 4

Glucose = ethanol + carbon dioxide

Question 5

Fermentation symbol equation

Answer 5

C6H1206 = 2C2H50H + 2CO2

Question 6

Explain why athletes need to breath heavier after strenuous exercise

Answer 6

The build up of lactic acid causes pain and slows and stops muscle contraction, causing cramp.
This means the athlete is less likely to participate in their activity due to injury/pain.
To prevent this, breathing heavier compensates for the oxygen debt, the extra oxygen inhaled reacts with the lactic acid, breaking it down

Question 7

State one difference and one similarity between anaerobic respiration in animals and in plants.

Answer 7

SIMILARITY:
Glucose is the reactant in both processes.
DIFFERENCE:
In animals, lactic acid is the product, but for plants, ethanol and carbon dioxide are produced.

Question 8

Compare the processes of anaerobic and aerobic respiration (3)

Answer 8

Aerobic and anaerobic respiration differ because oxygen is only required in aerobic, and not anaerobic.
This then means that the glucose molecules in anaerobic respiration are’t fully broken down, like they are in aerobic respiration.
This leads to poisonous lactic acid to be produced, instead of carbon dioxide and water.

Question 9

Where does anaerobic respiration take place

Answer 9

Cytoplasm

Question 10

Why does anaerobic respiration take place here instead?

Answer 10

It takes place in the cytoplasm since most anaerobic cells do not have specialized organelles