Question

warnings appear when
multiple not allowed. this test can only be taken once.
attempts
force once started, this test must be completed in one sitting. do not leave the tes
completion
this test does not allow backtracking. changes to the answer after submissio
your answers are saved automatically.
remaining time: 42 minutes, 14 seconds.
question completion status:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
moving to the next question prevents changes to this answer.
question 35
what is oxygens role in cellular respiration?
o a. to combine with hydrogen atoms to create peroxides
b. to allow cells to breathe
o c. all of the above
d. to remove spent electrons from the electron transport chain
e. to help increase atp formation in glycolysis
moving to the next question prevents changes to this answer.

Explanation:

In cellular respiration, oxygen acts as the final electron acceptor in the electron transport chain. It combines with electrons and hydrogen ions to form water. Let's analyze each option:

• Option a: Oxygen combines with hydrogen to form water (\(H_2O\)), not peroxides.
• Option b: This is a very vague and incorrect description. Cellular respiration is a biochemical process, and cells do not "breathe" in the sense this option implies.
• Option c: Since a and b are incorrect, c (all of the above) is also incorrect.
• Option d: This is correct as oxygen removes spent electrons (along with \(H^+\)) from the electron transport chain.
• Option e: Glycolysis is an anaerobic process (does not require oxygen), so oxygen does not play a role in increasing ATP formation in glycolysis.

Answer:

D. to remove spent electrons from the electron transport chain