Question

wered PUIUL SUUWWUIN VULPUL L E 1. Circle all of the following terms that are associated with the definition of enzymes Catalyst zymogen protein globular irreversible substrate 2. Pepsin, a protease enzyme that hydrolyzes polypeptides, functions in the stomach at an optimum pH of 1.5 to 2.0. What happens to the rate of pepsin-catalyzed reaction affected by each of the following conditions (#20.20)? 2.1) increasing the concentration of polypeptides (substrate) 2.2) changing the pH to 5.0 2.3) running the reaction at 0 °C 2.4) using less pepsin (enzyme) 3. Oxaloacetate is an inhibitor of the enzyme succinate dehydrogenase (20.36)? 3.1) What is the substrate for the enzyme? 3.2) What reaction is the enzyme catalyzing? 3.3) What does an inhibitor do to the reaction? 4. Indicate whether each of the following would be a substrate (S) or an enzyme (E) (#20.64): 4.1) glucose: 4.2) hydrolase: 4.3) maleate isomerase: 4.4) alanine: 4.5) amylose: 4.6) amylase: 5. Give the substrate for each of the following enzymes (#20.66): 5.1) maltase: 5.2) fructose oxidase: 5.3) phenolase: 5.4) sucrose:

Answer 1

SOLN 1

1. catalyst and enzymes are most often uses simultaneously

2. zymogen is also an enzyme

3. protein : enzymes are made up of proteins

4. irrversible : related to enzyme inhibition

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