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...
icon
Related questions
icon
Concept explainers
Question

28, 29

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.
Tight junctions are cell-cell junctions found between adjacent cells of the epithelium
that lines the small intestine. What is the function of these cellular junctions?
a) to recognize pathogenic organisms present in the lumen of the small
intestine
b) to seal the epithelium and prevent movement of substances between cells
O c) to attach epithelial cells to a basement membrane
d) to release digestive enzymes into the intestinal lumen
Transcribed Image Text:Tight junctions are cell-cell junctions found between adjacent cells of the epithelium that lines the small intestine. What is the function of these cellular junctions? a) to recognize pathogenic organisms present in the lumen of the small intestine b) to seal the epithelium and prevent movement of substances between cells O c) to attach epithelial cells to a basement membrane d) to release digestive enzymes into the intestinal lumen
Expert Solution
steps

Step by step

Solved in 3 steps

Blurred answer
Knowledge Booster
Carbohydrates
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY