Microbiology Ch 5 Learning Activity 2024 Edition.

Microbiology Ch 5 Learning Activity 2024 Edition. Which of the following molecules is broken down in cellular respiration, providing fuel for the cell? - ANSWER glucose Which energy-rich molecule directly powers cell work? - ANSWER ATP How does a competitive inhibitor slow enzyme catalysis? - ANSWER They compete with the substrate for the enzyme's active site. What enables competitive inhibitors to bind to a specific enzyme? - ANSWER Competitive inhibitors have structures that resemble the enzyme's substrate. If high amounts of sulfanilamide are in the presence of an enzyme whose substrate is PABA, what outcome is expected? - ANSWER The enzyme will stop functioning. Which of the following statements regarding competitive inhibitors is true? - ANSWER Competitive inhibitors decrease the rate of enzyme activity. How does a noncompetitive inhibitor reduce an enzyme's activity? - ANSWER The inhibitor binds to the enzyme in a location other than the active site, changing the shape of the active site. What would be the likely outcome if you increased the concentration of substrate for an enzyme in the presence of a noncompetitive inhibitor? - ANSWER No change in enzyme activity would be observed. How is nevirapine used to treat HIV infections? - ANSWER It alters the active site of reverse transcriptase, decreasing that enzyme's activity. Which of the following statements about fermentation is true? - ANSWER It is an alternative way to return electron carriers to their oxidized state. What is the role of pyruvic acid in fermentation? - ANSWER It takes the electrons from NADH, oxidizing it back into NAD+.