9 explain how endergonic reactions can be driven by

Info iconThis preview shows pages 2–3. Sign up to view the full content.

View Full Document Right Arrow Icon
9. Explain how endergonic reactions can be driven by phosphorylation. What is ATP’s role in this process? Include a diagram of ATP labeled with its three parts. 10. Draw a graph to show the change in energy from reactant to product over the course of an exergonic reaction, include a line for an enzyme-mediated version of the same reaction. Label: transition state, activation energy without an enzyme, activation energy with an enzyme, and energy released. 11. How do enzymes increase the rate of reactions? 12. Describe the properties of enzymes. 13. Explain the lock-and-key model of enzyme activity. Be sure to comment on what the active site of an enzyme does. How does the induced-fit hypothesis further refine this model? 14. How does enzyme and substrate concentration affect enzyme activity? 15. How does temperature, salinity and pH affect enzyme activity? 16. Compare and contrast competitive inhibition and allosteric regulation. 17. What is feedback inhibition? Discuss how ATP can act as an allosteric inhibitor for catabolic enzymes. How is this an example of feedback inhibition? Chapter 9: 1. What is the relationship between photosynthesis and cell respiration? Be sure to include the overall chemical equation for both reactions. 2. Distinguish between oxidation and reduction. Why are these processes significant to cellular respiration? 3. In the following balanced chemical equation, C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O which element is reduced? Which is oxidized? 4. Where does glycolysis take place in the cell? What are the starting materials of glycolysis, and what is produced in glycolysis? 5. How is the exergonic hydrolysis of ATP coupled to the endergonic reactions of the energy-investment phase of glycolysis? How are the exergonic reactions of the energy-payoff phase of glycolysis coupled to the endergonic synthesis of ATP and NADH? 6. Compare and contrast alcohol fermentation and lactic acid fermentation. Why is it necessary to convert acetaldehyde to ethanol in alcohol fermentation, and pyruvate to lactate in lactic acid fermentation? 7. Explain how dehydrogenase enzymes are involved in the transfer of energy from substrates to NAD + . How is NAD + changed in the process? 8. What steps must occur between glycolysis and the Citric Acid (Kreb’s) Cycle? Where in the cell do these occur? 9. Where does the Krebs Cycle occur in the cell? What are the starting materials of the Krebs Cycle and what is produced in the Krebs Cycle? 10. What is the difference between oxidative phosphorylation and substrate-level phosphorylation? 11. Oxidative Phosphorylation includes two steps. What are they? What happens during each step and how are the steps linked? 12. Describe the structure of the electron transport chain. Include a drawing. 13.
Background image of page 2

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page2 / 6

9 Explain how endergonic reactions can be driven by...

This preview shows document pages 2 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online