Several of the molecules called vitamins act as enzyme cofactors. Vitamin deficiencies cause disease. What is the most direct explanation for this? a) If cofactors are missing, enzymes cannot function properly, and important reaction products will be absent from cells. b) Vitamins combine with nonprotein molecules to delay the onset of disease. c) Cofactors inhibit enzymes found in disease-causing bacteria and viruses. When cofact are absent, these disease-causing agents multiply. d) Normal regulation cannot occur in the absence of cofactors. As a result, all enzymes will function all of the time.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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How might a change of one amino acid at a site, distant from the active site of an
enzyme, alter an enzyme's substrate specificity?
a) by changing the enzyme's location in the cell
b) by changing the shape of an enzyme
c) An amino acid change away from the active site cannot alter the enzyme's
substrate specificity.
d) by changing the enzyme's binding of allosteric regulator
e) by changing the enzyme's pH optimum
Transcribed Image Text:How might a change of one amino acid at a site, distant from the active site of an enzyme, alter an enzyme's substrate specificity? a) by changing the enzyme's location in the cell b) by changing the shape of an enzyme c) An amino acid change away from the active site cannot alter the enzyme's substrate specificity. d) by changing the enzyme's binding of allosteric regulator e) by changing the enzyme's pH optimum
Several of the molecules called vitamins act as enzyme cofactors. Vitamin
deficiencies cause disease. What is the most direct explanation for this?
a) If cofactors are missing, enzymes cannot function properly, and important
reaction products will be absent from cells.
b) Vitamins combine with nonprotein molecules to delay the onset of disease.
c) Cofactors inhibit enzymes found in disease-causing bacteria and viruses.
When cofactors are absent, these disease-causing agents multiply.
d) Normal regulation cannot occur in the absence of cofactors. As a result, all
enzymes will function all of the time.
Transcribed Image Text:Several of the molecules called vitamins act as enzyme cofactors. Vitamin deficiencies cause disease. What is the most direct explanation for this? a) If cofactors are missing, enzymes cannot function properly, and important reaction products will be absent from cells. b) Vitamins combine with nonprotein molecules to delay the onset of disease. c) Cofactors inhibit enzymes found in disease-causing bacteria and viruses. When cofactors are absent, these disease-causing agents multiply. d) Normal regulation cannot occur in the absence of cofactors. As a result, all enzymes will function all of the time.
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