Which of the following is incorrect about chymotrypsin, trypsin, and elastase?a. They catalyze the hydrolysis of the peptide bondb. They have similar amino acid sequences and tertiary structuresc. None; all the other choices are correctOd. They have different substrate binding sites

Introduction: Chymotrypsin is a digestive enzyme present in our bodies which is secreted by the…

Answered: Which of the following is incorrect…

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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This assay is the most common method of detection in enzyme assays: A. рН B. spectrophotometric assay C. radiation D. electromagnetism The structure of THF comes from which derivatives: A. Pteridine derivative B. p-Aminobenzoic acid C. Glutamate D. All of the above Role of coenzyme, except for: A. Electron transfer reactions B. Allow precise orientation of the substrate at the active site C. Chemical group transfer reactions D. None of the above
A3 Glucosylacetamide has a structure similar to the transition state during catalysis by the enzyme hexokinase and therefore would likely be A. covalently attached to hexokinase at a regulatory site distinct from the active site. B. covalently bound to an active site amino acid of hexokinase. C. a high-affinity hexokinase inhibitor. D. more rapidly hydrolyzed than ATP during catalysis.
Branched-chain amino acids are important in metabolic processes for all of the following reasons except a. They serve as nonessential amino acids precursors. b. Their major role is in liver amino acid metabolism. c. They are a major transport form of amino nitrogen in blood. d. They are a critical source of hydrophobic side chains in DNA-binding proteins.
5. Which of the following statements is/are correct regarding allosteric regulation?a) Allosteric effector controls the activity of an enzyme by irreversible binding.b) Allosteric effector binds to the regulatory sitec) Allosteric activator causes changes in the catalytic site enhancing the substrate binding.d) Allosteric inhibitor causes changes in the catalytic site decreasing the substrate binding. explain each option
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What are the main theoretical models that try to explain the formation of the enzyme-substrate complex?
Answer the following using the picture attached: A. How does pepsin differ from chymotrypsin in terms of its active site residues and mechanism? B. How do these changes permit pepsin to operate at such a low pH?
If there was a molecule that causes Hb to be more stable in the T state, this molecule would: a. Generally, raise the affinity of Hb for O2 b. Generally, lower the affinity of Hb for O2 c. Generally, cause Mb to favor the R state while Hb is in the T state d. Generally, cause Hb to dissociate into αβ dimers
COO COO C -NH2 CH2 CH2 1 3 CH2 CH2 CH2 4 CH2 H- -NH3 -NH3 H- C COO CO- А C a. Aminotransferase is the only enzyme that can catalyze the B -> C conversion b. Reaction 4 requires ATP c. All reactions (1-4) run only in the liver d. Compound A is a nitrogen donor for synthesis of 5- ribosylamine e. Reaction 1 is a hydrolysis and the enzyme catalyzing this reaction is active only in hepatocytes
Select all FALSE statements about allosteric enzymes. a. They interconvert between a more active form and a less active form. b. They tend to have a hyperbolic curve of ?0 vs. [S]. c.They conform to Michaelis–Menten kinetics. d. They are generally small single subunit proteins. e. They may have binding sites for regulatory molecules that are separate from active sites.
Why does enzyme activity decrease because of pH changes? A. Disruption of hydrogen-bonding interactions between amino acids that are polar-uncharged and charged. B. Disruption of electrostatic interactions between charged amino acids C. Disruption of hydrophobic interactions between nonpolar amino acids. D. Both A and B E. All of these
Which of the statements below regarding glyphosate are true? (Choose all true statements) A.Glyphosate interacts with EPSP synthase because it resembles the substrate S-3P B.The interaction of S-3P is necessary for glyphosate binding. C.Glyphosate likely binds to both conformations of EPSP synthase shown in question 7. D.Glyphosate decreases Km for S-3P and thus likely the increases the affinity of the enzyme for substrate E.Glyphosate likely increases feedback inhibition by the product of the reaction EPSP

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Which of the following is incorrect about chymotrypsin, trypsin, and elastase? a. They catalyze the hydrolysis of the peptide bond b. They have similar amino acid sequences and tertiary structures c. None; all the other choices are correct d. They have different substrate binding sites