Questions: Question 29 (0.5 points) The following chemicals are involved in electron transport. Which of these chemicals has the strongest pull on electrons? O2 FADH2 NADH ubiquinone Question 30 (0.5 points) Which term refers to cellular respiration that occurs in the presence of oxygen? catabolic respiration anaerobic respiration fermentation aerobic respiration

Question 29 (0.5 points) The following chemicals are involved in electron transport. Which of these chemicals has the strongest pull on electrons? $\mathrm{O}_{2}$ $\mathrm{FADH}_{2}$ NADH ubiquinone

The answer is: $\mathrm{O}_{2}$

Explanation:

• $\mathrm{O}_{2}$ (oxygen) has the strongest pull on electrons because it is the final electron acceptor in the electron transport chain and has a high affinity for electrons.
• $\mathrm{FADH}_{2}$ and NADH are electron carriers that donate electrons to the electron transport chain, but they do not have as strong an affinity for electrons as oxygen.
• Ubiquinone (coenzyme Q) is an electron carrier within the electron transport chain, but it also does not have as strong an affinity for electrons as oxygen.

Question 30 (0.5 points) Which term refers to cellular respiration that occurs in the presence of oxygen? catabolic respiration anaerobic respiration fermentation aerobic respiration

The answer is: aerobic respiration

Explanation:

• Catabolic respiration is not a standard term used to describe cellular respiration in the presence of oxygen.
• Anaerobic respiration refers to cellular respiration that occurs without oxygen.
• Fermentation is a process that allows cells to produce energy without oxygen, typically resulting in the production of lactic acid or ethanol.
• Aerobic respiration is the correct term for cellular respiration that occurs in the presence of oxygen, where oxygen is used as the final electron acceptor in the electron transport chain.