5.1.7 - Aerobic respiration

Question 1

What are the 2 types of anaerobic fermentation?

Answer 1

Ethanol Fermentation
Lactate Fermentation

Question 2

What type of microorganisms use ethanol fermentation?

Answer 2

Yeast
Fungi

Question 3

What type of microorganisms use lactate fermentation?

Answer 3

Bacteria
mammalian muscle

Question 4

What are some of the consequences of anaerobic respiration lacking oxygen?

Answer 4

No final acceptor of electrons in ETC
ETC stops functioning
No more ATP produced from oxidative phosphorylation

Question 5

What happens to the enzymes involved in anaerobic respiration due to a lack of oxygen?

Answer 5

Reduced NAD and FAD not oxidised by electron carriers in ETC.
No oxidised NAD And FAD available in Krebs cycle

Question 6

In ethanol fermentation, what is formed when pyruvate is decarboxylated?

Answer 6

Ethanal
carbon dioxide

Question 7

What happens after ethanal is produced in ethanol fermentation?

Answer 7

It is reduced to ethanol by the enzyme alcohol dehydrogenase.

Question 8

What are 2 main differences between ethanol and lactate fermentation?

Answer 8

In ethanol fermentation, pyruvate is decarboxylated. It’s not in lactate fermentation.
The final product of lactate can be further metabolised.

Question 9

What stage occurs in both aerobic and anaerobic respiration?

Answer 9

Glycolysis

Question 10

What type of respiration produces more energy?

Answer 10

Aerobic

Question 11

What can lactate be converted to?

Answer 11

Pyruvate

Question 12

How many carbons are in lactate and ethanol molecules?

Answer 12

Lactate = 3 carbons
Ethanol = 2 carbons (pyruvate is decarboxylated)