Fermentation

Question 1

Pyruvate from glycolysis in the absence of oxygen

Answer 1

Pyruvate will undergoes fermentation (Lactic acid fermentation & alcohol fermentation)

Question 2

Rate of glycolysis is limited by

Answer 2

Regeneration NAD+

(NAD+တွေသာမရှိတော့ရင် Pyruvate oxidationမှာထွက်တဲ့ Hydrogenကလာသယ်ပေးမဲ့electron carrier မရှိတော့ရင်Glycolysisရပ်သွားမှာမလို့)

Question 3

Glycolysis takes places in all types of cellular respiration.True or False?

Answer 3

True

Anaerobic,aerobic and fermentation (Glycolysis takes place in all)

Question 4

Why NAD+ must be regenerate in cellular respiration?

Answer 4

Glycolysis takes places in all types of cellular respiration.And NAD+ require as proton carriers

Question 5

NAD+ regeneration is same in all type of cellular respiration.True or False?

Answer 5

False
Both anaerobic and aerobic NAD+ is regenerated by ETC but in fermentation NAD+ transfer its electrons to pyruvate again

Question 6

Final electron carrier of ETC in aerobic and anaerobic respiration

Answer 6

Aerobic-O2(release H2O)
Anaerobic-Sulfate (release H2S) *in sulfur reducing bacteria

Question 7

In fermentation,NADH transfer its electrons to_____.

Answer 7

Pyruvate and its derivatives

Question 8

Types of fermentation

Answer 8

1)Lactic acid fermentation
2)Alcohol fermentation

Question 9

In alcohol fermentation,pyruvate is transferred into _____ by releasing CO2.

Answer 9

Acetaldehyde (CO2 ထွက်)

Question 10

NAD+ regeneration in alcohol fermentation

Answer 10

Pyruvate——>Acetaldehyde
NADH gives its electron to Acetaldehyde and form NAD+

Question 11

Alcohol fermentation

Answer 11

Pyruvate>Acetaldehyde>Ethanol

*Release of CO2 & NAD+

Question 12

In which fermentation,NADH transfer its electrons directly to pyruvate?

Answer 12

Lactic acid fermentation

Question 13

Lactic acid fermentation

Answer 13

Pyruvate>Lactate

*Release of NAD+ only

Question 14

In lactic acid fermentation,NADH transfer its electrons to____ to form_____.

Answer 14

Pyruvate to form Lactate

Question 15

In which organisms alcohol fermentation takes place?

Answer 15

Many bacteria
Yeast(Fungi)

*In presence of O2,they can undergo aerobic respiration but in absence of O2,they undergoes alcohol fermentation

Question 16

In which organisms lactic fermentation takes place?

Answer 16

Certain bacteria & fungi
In human muscle cell during strenuous exercise

Question 17

Why lactic acid fermentation takes place in human muscle cell?

Answer 17

During strenuous exercise,more demand of O2 and ATP than supply so muscle undergoes lactic acid fermentation to give more O2 (no final e acceptor for moment)

After strenuous exercise,lactate will enter the liver to convert into pyruvate and enter the CAC and restart the cycle

Question 18

facultative anaerobes

Answer 18

The organisms that can undergoes both fermentation and aerobic respiration

Question 19

Obligate anaerobes

Answer 19

The organisms that can undergoes only fermention or only anaerobic respiration

oxygenရှိတဲ့environmentကိုရောက်ရင်သေတောင်သေနိုင်

The organisms that can undergoes only aerobic respiration
(Brain cells)

Question 21

Product of alcohol fermentation

Answer 21

1NAD+ & 1CO2 (ethanol)

Question 22

Product of lactic acid fermentation

Answer 22

1NAD+ & lactate (no CO2)

Question 23

Anerobic respiration

Answer 23

Same with aerobic respiration but uses less electronegative molecules
ETC also takes places

-used SO4 and released H2S insetad of H2O (sulfur reducing bacteria)