Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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- Please, please I do not understand this question for Biochemistry. Can you help me? Steps leading to the correct answer would be helpful!arrow_forwardIntermediates of a pathway are shown in the following scheme. Using curved arrows, show the mechanism of each step labeled with a blue letter. Draw out abbreviated structures of the coenzymes, so that you can effectively show all arrow pushing. You may abbreviate the coenzymes by putting R groups on the molecule, but do draw out the parts of the structure that are involved in the arrow pushing. Some of the transformations will require you to show multiple structures to show all of the arrow pushing (particularly some of the coenzyme-mediated steps). You do not need to show specific amino acid residues that perform the catalysis. You can abbreviate acidic amino acid residues “Enz–B–H” and basic residues “B–Enz”.arrow_forwardfor the coenzyme structures below label the following: a.) label the coenzymes b.) identify the reactive components of both coenzymes c.) identify the component that differs between NAD+ and NADP+ d.) how come these coenzymes are known as dinucleotides?arrow_forward
- Please answer this question and the highlighted question is wrong please explain why and give me the correct answerarrow_forwardSoy sauce is prepared in a CLOSED tank by fermenting a salted mixture of soybeans and wheat with yeast, over a period of 8 to 12 months. The resulting sauce (after solids are removed) is rich in ethanol. (a) How is ethanol produced in the resulting soy sauce? What is the importance of this process? Include the enzymes involved. (b) Could ethanol be produced when the reaction mixture is incubated in an OPEN tank?arrow_forward1. In a catabolic pathway, metabolite X gets converted into metabolite Y, metabolite X 0 J mol-¹ and AG' is <0 J mol-¹ for this reaction. a) At standard states, is this reaction favorable? b) Is the reaction favorable or unfavorable at cellular condition? c) Is this an endergonic or exergonic reaction in the cell? d) Would you describe this as a thermodynamically downhill or uphill reaction in the cell?arrow_forward
- Match the following catalytic strategies with their example. Place a Letter on the picture. There are only two examples given. CH2OH CH2OH CH2OH CH2OH он он OH OH + H20 OH OH OH но H. но но OH OH OH OH OH OH A. Oxidoreducatase B. Transferase C. Hydrolase D. Lyase NH3 E. Isomerase F. Ligase R-CH-COO "ooc-CH2-CH2-C-COO Amino acid a-Ketoglutaratearrow_forwardAn uncatalyzed reaction has keq=50. in the presence of an appropriate enzyme.the forward rate of the reaction increased by 20-fold.what is the equilibrium constant in the presence of the enzyme?arrow_forwardWhich of the following statements is correct for the reaction catalyzed by chymotrypsin? ○ The substrate carbon atom bonded to Ser195 in the acyl enzyme intermediate has a tetrahedral geometry ○ The Ser195 hydroxyl oxygen atom is the catalytic nucleophile for the deacylation phase of the overall reaction mechanism ○ The oxyanion hole accelerates the reaction by tightly binding the substrate carbonyl oxygen at the peptide bond that is cleaved ○ Asp102 stabilizes the tautomeric state of the catalytic histidine ○ The first reaction product contains a proton derived from an active-site water moleculearrow_forward
- Discuss in a short paragraph (3–5 sentences for each mutation) whether or not the enzyme is likely to completely lose catalytic activity if the following mutations are carried out. You may assume that steric effects do not distort the active site so much that catalysis cannot take place; focus your analysis on discussing the chemistry the amino acid side chains are able to perform and the properties that enable them to do so. Mutation 1: H to E Mutation 2: H to N Mutation 3: S to D Mutation 4: S to Carrow_forwardGiven the following enzyme catalyzed reaction, identify the class and subclass of the enzyme involved: NADH NAD* + H* C-O C-OT C=0 H-C-OH CH CH Class: Subclass:arrow_forwardThis is a picture of the catalysis of alcohol by ADH with an inhibitor binding as an aldehyde analog. I have two questions. First, what would the enzyme be classified as and why? Also, what would the steps of this mechanism be?arrow_forward
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