Which of the following involve glycolysis, the TCA cycle, and electron transport chain? A. aerobic respiration,...

Which of the following involve glycolysis, the TCA cycle, and electron transport chain?

	A.	aerobic respiration, anaerobic respiration and fermentation
	B.	aerobic respiration and anaerobic respiration, only
	C.	anaerobic respiration and fermentation, only
	D.	aerobic respiration, only

Expert Solution

Aerobic respiration :-
• This is type of respiration which occurs in presence of oxygen.
These are the steps in this process :-
1. Glycolysis - In this step glucose is converted into pyruvate and ATP, NADH are formed.
This step is common in both aerobic and anaerobic respiration.
2. Krebs cycle/ TCA cycle - In this step NAD and FADH are converted into NADH and FADH2. Cabon dioxide is released.
3. Electron transport chain - In this process, electrons received from NADH and FADH2 and these electrons are transferred to molecular oxygen.
This process occurs only in presence of oxygen because oxygen acts as last electron acceptor in this chain.

Fermentation :-
• In absence of oxygen pyruvate goes through fermentation process.
• This may be of two types - alcoholic and lactic acid fermentation.
• No Krebs cycle and electron transport chain is involved in this process.

Anaerobic respiration :-
• This term is used for combined glycolysis and fermentation process.

Now in question,
Option (D) is correct answer.
Aerobic respiration only.
• TCA cycle and electron transport chain are only involved in aerobic respiration.
• Glycolysis is common in aerobic and anaerobic respiration.

gladiator answered 2 years ago

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