anaerobic respiration

Question 1

what is the importance of NAD in anaerobic respiration?

Answer 1

-regenerated by oxidising back to NAD so that energy yielding phase can continue

Question 2

what are the two forms of anaerobic respiration?

Answer 2

• alcoholic fermentation (plants)

- lactic fermentation (animals)

Question 3

explai alcoholic fermentation

Answer 3

• pyruvate decarboxylated to ethanal releasing 1 molecule of carbon dioxide
• ethanal reduces to ethanol by alchohol dehydrogenase
• NAD recycled simultaneously

Question 4

explain lactic fermentation

Answer 4

pyruvate reduced to lactic acid by NADH- catalysed using enzyme lactic dehydrogenase
NADH oxidises back to NAD