Ap Biology Ch.6 |48 Questions| With Correct Answers.

lungs {Ans: In humans, oxygen and carbon dioxide are exchanged with the atmosphere via the _____.}A proton gradient is formed {Ans: In cellular respiration, which of the following is performed directly by the electron transport chain (or its components)?}plasma membrane {Ans: Bacteria have no membrane-enclosed organelles. However, some still generate ATP through cellular respiration. Where is the electron transport chain found in these organisms?}nucleotides {Ans: The principal molecules involved in transporting electrons to the electron transport chain are composed of _____.}CO2 and NADH are formed {Ans: When pyruvate is converted to acetyl CoA, _____.}loses an electron {Ans: A molecule is oxidized when it _____.}We would not make enough ATP to meet our energy requirements {Ans: Through respiration, humans breathe in O2 and breathe out CO2. However, what would happen if we did not breathe in O2?}the electron transport chain {Ans: Which of the following directly requires molecular oxygen (O2)?}due to the potential energy of a concentration gradient of hydrogen ions across a membrane {Ans: What is the mechanism of action for the enzyme ATP synthase? ATP is formed _____.}4 ATP {Ans: Substrate-level phosphorylation directly generates ATP during a chemical reaction.