The one which is present in all aerobic species is _________?
Correct answer: A. Cytohrome c
- A. Cytohrome c
- B. Cytochrome a
- C. Cytochrome a3
- D. Cytochrome b
Explanation
Cytochrome c is a mobile electron carrier in the electron transport chain and transfers electrons between respiratory complexes, making it a standard component of aerobic respiration. Cytochromes a, a3 and b occur in particular respiratory complexes rather than being the general component identified across aerobic organisms. Students may choose d because cytochrome b is also part of the electron transport chain, but it is not the intended universal marker here.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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