In: Biology
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 |
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.