Chapter 9.2 End of Chapter Assessment, Understand Key Concepts Questions with accurate answers, Rated A.

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Chapter 9.2 End of Chapter Assessment, Understand Key Concepts 12. The net gain of energy from glycolysis is -Answer- B. 2 ATP molecules. 13. The Krebs cycle takes place within the -Answer- C. Mito... chondrion. 14. The electron transport chain uses the high-energy electrons from the Krebs cycle to -Answer- C. Convert acetyl-CoA to citric acid. 15. How is glucose changed during glycolysis? -Answer- It's broken down into pyruvic acid. 16. What is NAD+? Why is it important? -Answer- It is a co-enzyme involved in glucose metabolism in both glycolysis and TCA. It is the most abundant enzyme in cells and transports electrons. 17. Summarize what happens during the Krebs cycle. What happens to high-energy electrons generated from the Krebs cycle? -Answer- -The pyruvates produced in glycolysis are converted to Acetyl CoA molecules, which enter the Krebs cycle. -Acetyl-CoA combines with a four-carbon compound, forming a six-carbon compound and releasing CoA. -CO2 (carbon dioxide) is released from the compound, making a five carbon compound. Electrons are transferred to NAD+, making NADH. -CO2 is released from the five-carbon compound, making a four-carbon compound. One molecule of ATP is made, as is a molecule of NADH. -The four-carbon compound is converted into a new four-carbon compound; electrons are transferred to FAD, making FADH2. -The four-carbon compound is converted to the original compound that started the cycle. Another molecule of NADH is produced. Next, the electrons carried by NADH and FADH2 go through something called the electron transport chain; the electrons are donated through a chain, where they lose energy through every molecule it passes through. The energy is used to power [Show More]

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