5.6.7 Anaerobic Respiration Flashcards
1
Q
Why is it that respiration would come to a halt if there is no oxygen?
A
- Due to no oxygen being the final electron acceptor.
2
Q
Why would respiration stop since glycolysis does not require oxygen?
A
- NAD must be regenerated from NADH - as the ETC no longer accepts the hydrogen from NADH.
3
Q
What would happen in glycolysis if NAD was not regenerated?
A
- NAD would run out and glycolysis would stop.
4
Q
What are the two different ways that NAD can be regenerated in anaerobic respiration?
A
- Pyruvate and NADH would produce ethanol, carbon dioxide and NAD
- Pyruvate and NADH would produce lactate and NAD.
5
Q
What enzyme catalyses alcoholic fermentation?
A
- Carboxylase.
6
Q
Is the alcoholic fermentation reaction reversible or irreversible?
A
- Irreversible.
7
Q
What enzyme catalyses lactic fermentation?
A
- Lactate dehydrogenase.
8
Q
Is the lactic fermentation reaction reversible or irreversible?
A
- Reversible.
9
Q
What is the benefit of producing ethanol from pyruvate in alcoholic fermentation?
A
- Producing ethanol from pyruvate regenerates oxidised NAD and allows glycolysis to continue.
10
Q
What is the benefit of producing lactate from pyruvate in lactic fermentation?
A
- Producing lactate from pyruvate regenerates oxidised NAD and allows glycolysis to continue.
