Oxygen is required in aerobic respiration for:
Correct answer: C. Accepting electrons at the end of the electron transport chain
- A. The reduction of hydrogen carriers
- B. The oxidation of glyceraldehyde 3-phosphate
- C. Accepting electrons at the end of the electron transport chain
- D. Maintaining an oxygen concentration gradient in mitochondria
Explanation
The correct answer is Option C: accepting electrons at the end of the electron transport chain. Oxygen's primary role in aerobic respiration is to accept electrons at the end of the electron transport chain, allowing the chain to continue and produce ATP efficiently. This process occurs in the mitochondria, where oxygen combines with electrons and protons to form water.
Last updated
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.
Practise Bioenergetics
1,378 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 NADH in respiratory chain produces:
6-NADH can yield:
A marathon runner who trains at altitude increases the capacity of the blood to carry oxygen. The direct benefit to respiration is
About __________ % of photosynthesis is carried by terrestrial plants, while rest occurs in ocean, lakes, and ponds?
According to the chemiosmotic theory, ATP is synthesised when