QUESTION 26In the câtalytic mechanism of an aminotransferase, one substrate binds and reacts, leaving behind an amine groupcovalently attached to the enzyme, then the second substrate can bind.This is best described as:Association dissociationO random single displacementping-pong or double displacementO ordered single displacementQUESTION 27For a Michaelis-Menten enzyme, kį = 4.0 x 10° M's,k] = 2.0 x 10° s-!, and kɔ = 5.0 x 10 s What is its Km?Give your answer in uM in four significant figures in normal notation.QUESTION 28Which amino acid is most likely to break an alpha helix?Click Save and Submit to save and submit. Click Save All Answers to save all answers.798 Mostly cloudyP Type here to search

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Answered: QUESTION 26 In the câtalytic mechanism…

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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QUESTION 22 When the final product of a series of enzymatically-catalyzed reactions binds to the first enzyme in the pathway to limit its production, it generally uses ___ because the structure of this final product is generally not similar to that of any of the enzyme's normal substrates. Allosteric activation Zymogen activation Covalent modification Competitive inhibition Allosteric inhibition
QUESTION 10 Select a property that does not belong to allosteric enzymes. They conform to hyperbolic Michaelis-Menten kinetics They may have binding sites for regulatory molecules that are separate from active sites They tend to have a signmoidal curve of rate versus [S] They undergo conformation changes as a result of modulator binding.
QUESTION 18 Stable molecules that resemble the transition state of enzyme catalyzed reactions are very potent inhibitors. Provide an explanation as to why these compounds are better than inhibitors based on the substrate. TT TT Paragraph v v 3 (12pt) = - E · T Arial T T, O Mashups 66 HTHL CSS CS Scanned with CamScanner
Question 12 The disulfide bridges: A Are generated by an intra- or inter- molecular oxidation reaction B Can be selectively reduced by SDS (Sodium Dodecyl Sulfate) C Are bonds that possess an intermediate in- teraction energy comprised between that hydrogen bonds and that of ionic bonds D Participate in the stabilization of sec- ondary structures E Are established between the side chains of amino acids methionine
QUESTION 26 During gluconeogenesis, whereby liver cells convert pyruvate to glucose, Fructose-6-phosphate (F6P) is converted to Glucose-6-phosphate (G6P). If the standard equilibrium concentrations are: [F6P] = 0.52 M and [G6P] = 1.48 M, then Keq’ is ______ and the reaction is ________. Fructose-6-P ó Glucose-6-P > 1; exergonic > 1; endergonic < 1; exergonic < 1; endergonic
Question 10 The cyclic form of the sugar in DNA is a beta-D-3-deoxyribofuranose. A True B False
QUESTION 10 UDP-glucuronosyltransferase enzymes bind the organic compound UDP-glucuronic acid (UDP-GA) in order to catalyse the transfer of a glucuronic acid group from UDP-GA to a drug molecule, releasing UDP from the active site as a product. UDP is then regenerated by the activity of another enzyme. What terms could be used to describe UDP-GA?
Question 8 The major structural component of the exoskeletons of invertebrates is composed of N-acetyl-B-D-galactosamine joined by B-1,4-glycosidic bonds True False
Question 5 An a-helix has the sequence: NH3-Ser-Glu-Gly-Asp-Trp-Gln-Leu-His-Val-Phe-Ala-Lys-Val-Glu- COO-. The carbonyl oxygen (in the peptide bond) of the W5 residue is hydrogen bonded to the amide nitrogen of H8 E2 O V9 O S1
QUESTION 20 Trypsin digestion of the peptide sequence A2-P2-M3-E4-R5-G6-F7-Hg-Ag-I10-A11-H12-T13-Y14-G15-P16 results peptide fragment(s). in To elute the His-tag protein from the nickel agarose column, the elution buffer contains a high concentration of Chymotrypsin cleaves the N-terminus side of Phe, Tyr, and Trp. True O False
Question 15 The GroES subunit has 14 identical 549-residue subunits arranged in two stacked rings with 7 subunits eac True O False
QUESTION 5 Chymotrypsin is a pancreatic digestive enzyme that is inactive until it is secreted into the intestines, where it is hydrolyzed by the protease Trypsin. One of the fragments that results from this hydrolysis is the active form. This form of enzyme regulation is: Competitive activation O Allosteric inhibition Covalent modification O O Zymogen activation Allosteric activation

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