anaerobic respiration Flashcards
1
Q
what is the starting molecule for anaerobic respiration?
A
pyruvate from glycolysis
2
Q
what is the first stage of anaerobic respiration from pyruvate?
A
reduced NAD is oxidised to NAD so that glycolysis continues
3
Q
what is the second stage of anaerobic respiration from reduced NAD?
A
- the H from reduced NAD reduces pyruvate to lactate
- catalysed by lactate hydrogenase
4
Q
what are the products of anaerobic respiration?
A
2 molecules of lactate
5
Q
what is the sequence of events for anaerobic respiration in ethanol fermentation?
A
pyruvate
ethanal
ethanol
6
Q
what is ethanol fermentation used by?
A
- fungi eg yeast
- plants
7
Q
what is the first stage of anaerobic respiration in ethanol fermentation?
A
- decarboxylation of pyruvate to ethanal
- using pyruvate decarboxylase
- produces CO2
8
Q
what is the second stage of anaerobic respiration in ethanol fermentation?
A
- ethanol accepts H atoms from reduced NAD
- becomes reduced to ethanol using dehydrogenase
9
Q
what is the third stage of anaerobic respiration in ethanol fermentation?
A
- reduced NAD is reoxidised
- made available to accept more H atoms during oxidation of triose phosphate so glycolysis can continue
