2. Which of the following statements is TRUE? A. The primary structure of proteins is often depicted by ribbon diagrams where the helices are shown by corkscrew B. Extensive denaturation changes at 2° to 4° levels, if any, may render the process irreversible. C. Keratin is a classic example of a globular protein found in human fingernails and bird feathers D. Globular proteins form part of the matrix upon which cells are arranged in animal tissues. 3. If a native enzyme is composed of 124 amino acids, 8 of which are cysteine. How many disulfide bridges can be forme in the structure? A. 8 В. 4. С.2 D. none 4. A reaction system involves sucrose as the substrate and the intestinal enzyme sucrose. What will happen to the reaction rate if the pH is altered from 6.0 to 8.0 when the optimum pH is 6.2? A. Increase in reaction rate B. Decrease in reaction rate C. Unaffected D. Inconclusive 5. What is the type of enzyme inhibition involved if the inhibitor decreases enzyme activity by binding to a site on the enzyme other than the active site? A. Irreversible noncompetitive inhibition B. Reversible noncompetitive inhibition C. Irreversible competitive inhibition D. Reversible competitive inhibition
2. Which of the following statements is TRUE? A. The primary structure of proteins is often depicted by ribbon diagrams where the helices are shown by corkscrew B. Extensive denaturation changes at 2° to 4° levels, if any, may render the process irreversible. C. Keratin is a classic example of a globular protein found in human fingernails and bird feathers D. Globular proteins form part of the matrix upon which cells are arranged in animal tissues. 3. If a native enzyme is composed of 124 amino acids, 8 of which are cysteine. How many disulfide bridges can be forme in the structure? A. 8 В. 4. С.2 D. none 4. A reaction system involves sucrose as the substrate and the intestinal enzyme sucrose. What will happen to the reaction rate if the pH is altered from 6.0 to 8.0 when the optimum pH is 6.2? A. Increase in reaction rate B. Decrease in reaction rate C. Unaffected D. Inconclusive 5. What is the type of enzyme inhibition involved if the inhibitor decreases enzyme activity by binding to a site on the enzyme other than the active site? A. Irreversible noncompetitive inhibition B. Reversible noncompetitive inhibition C. Irreversible competitive inhibition D. Reversible competitive inhibition
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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