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Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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21. Enzyme X exhibits maximum activity at pH = 6.2. X shows a fairly sharp decrease in its activity when the pH goes much lower than 5.4. One likely interpretation of this pH activity is that: a His residue on the enzyme is involved in the reaction. a Glu residue on the enzyme is involved in the reaction. the enzyme has a metallic cofactor. the enzyme is found in gastric secretions. a Lys residue on the enzyme is involved in the reaction. A. B. C. D. E. 22. Which of the following is a palindromic sequence? A. CCTTCCAA GCAAGGTT B. C. D. GAATCCGA CTTAGGCT ATGGCCAT TACCGGTA GGATCAAC CCTAGTTG E. GTATCCAG CATAGGTC 23. In a plot of I/V against 1/[S] for an enzyme-catalyzed reaction, the presence of a competitive inhibitor will alter the: A. B. C. D. E. curvature of the plot. intercept on the I/V axis. pKa of the plot. intercept on the 1/[S] axis. Vmax. 24. What term is given to carbohydrates linked at their anomeric carbons? A. Glycosides B. Non-reducing sugars C. Glycans D. Anomers E. Hemiketals
Transcribed Image Text:21. Enzyme X exhibits maximum activity at pH = 6.2. X shows a fairly sharp decrease in its activity when the pH goes much lower than 5.4. One likely interpretation of this pH activity is that: a His residue on the enzyme is involved in the reaction. a Glu residue on the enzyme is involved in the reaction. the enzyme has a metallic cofactor. the enzyme is found in gastric secretions. a Lys residue on the enzyme is involved in the reaction. A. B. C. D. E. 22. Which of the following is a palindromic sequence? A. CCTTCCAA GCAAGGTT B. C. D. GAATCCGA CTTAGGCT ATGGCCAT TACCGGTA GGATCAAC CCTAGTTG E. GTATCCAG CATAGGTC 23. In a plot of I/V against 1/[S] for an enzyme-catalyzed reaction, the presence of a competitive inhibitor will alter the: A. B. C. D. E. curvature of the plot. intercept on the I/V axis. pKa of the plot. intercept on the 1/[S] axis. Vmax. 24. What term is given to carbohydrates linked at their anomeric carbons? A. Glycosides B. Non-reducing sugars C. Glycans D. Anomers E. Hemiketals
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