The correct sequence of events in cellular respiration is as follows: glycolysis, Krebs Cycle, electron transport.
CELLULAR RESPIRATION:
- Cellular respiration is the process by which living organisms obtain energy needed for metabolic activities by breaking down food molecules.
Cellular respiration can either be:
- Aerobic respiration; which requires oxygen to take place
- Anaerobic respiration; which does not require oxygen to occur.
Aerobic respiration, however, is made up of three stages namely:
- Glycolysis: This is where glucose is broken down to produce pyruvate and 2 ATP molecules.
- Krebs cycle: This takes place in the mitochondrion to produce oxaloacetate, 2 CO2 molecules, 3 NADH molecules, 1 FADH2 molecule and 1 molecule ATP.
- Electron transport chain (ETC): This involves the transfer of electrons from one molecule to another in a series of biochemical reactions. ETC produces 36 ATP molecules.
- Therefore, the correct sequence of events in cellular respiration is as follows: glycolysis, Krebs Cycle, electron transport.
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