12.4 anaerobic respiration

Question 1

what is the condition to keep glycolysis working in anaerobic respiration?

Answer 1

NAD must be recycled to remove H atoms from TP -> pyruvate

Question 2

what is produced in anaerobic respiration in animals?

Answer 2

lactic acid / lactase

Question 3

how is lactic acid produced in anaerobic respiration?

Answer 3

pyruvate is reduced to lactase (accepts H atoms) & reduced NAD is oxidised to NAD

Question 4

how is lactase used by the body?

Answer 4

transferred to liver (toxic)
- broken down aerobically -> creates oxygen debt

Question 5

what is produced in anaerobic respiration by plants?

Answer 5

acetyl aldehyde -> ethanol

Question 6

how is ethanol produced?

Answer 6

• bacteria, fungi (yeast) & waterlogged roots:
• pyruvate loses 1 CO2 -> ethanal (acetyl aldehyde) -> ethanol (by accepting/reduced by H+ from reduced NAD)