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Concept explainers
(a)
Interpretation: The process which occurs during the covalent modification of an enzyme using phosphorylation reaction has to be stated.
Concept introduction: The process of covalently modifying the structure of enzyme by linking or removing a group from the amino acid within the structure of enzyme is called covalent modification. This process alters the activity of the enzyme.
(b)
Interpretation: The process which occurs during the covalent modification of an enzyme using a phosphatase enzyme has to be stated.
Concept introduction: The process of covalently modifying the structure of enzyme by linking or removing a group from the amino acid within the structure of enzyme is called covalent modification. This process alters the activity of the enzyme.
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Chapter 21 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- The correct enzyme involved in synthesizing atp from adp is: a. Kinase b. Protease c. Phosphorylasearrow_forwardIdentify the conditions that may affect enzyme activity in a reaction. SELECT ALL THAT APPLY A. Increasing Temperature B. Decreasing Substrate C. Lack of coenzyme D. Decreasing pHarrow_forwardWhich of the following is incorrect about the enzyme chymotrypsin? a. It catalyzes the addition of water across a double bond O b. It is known as a serine protease O c. Artificial substrates are used to monitor the reaction catalyzed by the enzyme d. It is classified as a hydrolasearrow_forward
- Enzymes can be regulated in a many different ways. Covalent modification is one way. Here, the functional groups are attached to or removed from the enzyme. A phosphate group is an example of a functional group that can be added to an enzyme. Depending on the enzyme, addition of a phosphate group can either increase or decrease an enzyme's activity. Evaluate the following names and identify the general name of an enzyme that functions to add phosphate groups to its substrate? A. isomerase B. phosphatase C. kinase D. ligasearrow_forwardbisphosphoglycerate mutase is an example of Select one: a. transferase b. lyase c. none d. isomerasearrow_forwardWhich of the following best explains why enzyme catalysis is affected by a change in pH? A. Change in pH alters ionization states of serine in the active site involved in nucleophilic catalysis B. The ionization states of his, asp and glu involved in acid/base catalysis are altered with change in pH C. Change in pH alters ionization states of contact amino acids in the active site D. All enzymes have optimum pHarrow_forward
- Define the following terms:a. oxidoreductaseb. lyasec. ligased. transferasee. hydrolasef. isomerasearrow_forwardAll of the following are ways of controlling enzyme mechanism, except A. Edman degradation B. zymogens C. phosphorylation D. allostericarrow_forwardPlease choose one of these answers A. An allosteric inhibitor appeared B. There was a dramatic change jn the pH. C. The enzyme had achieved its maximum velocity. D. The enzyme had denatured E. A large amount of the substrate had been consumed.arrow_forward
- which of the following statements are correct?a. coenzyme is an alternate name for all cofactors b. metal ions can function as cofactors c. all conjugated enzymes contain cofactorsarrow_forwardThe enzyme becomes denatured if the temperature is compared to its optimal temperature: O a. Too low O b. Too high O c. Too high or too lowarrow_forwardExplain the difference between competitive and allosteric inhibition in enzymes. Give an example from medicine for eacharrow_forward
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