Which one of the following statements about the control of enzyme activity by phosphorylation is correct?a) Phosphorylationof an enzyme results in a conformational changeb) Phosphorylationof an enzyme occurs only at specific tyrosine residuesc) Phosphorylationof an enzyme is carried out by phosphoprotein phosphatasesd) Enzyme control by phosphorylation is irreversible

Kinases are enzyme that catalyzes phosphorylation reactions, which involves the transfer of…

Answered: Which one of the following statements…

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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Similar questions

Decarboxylases can catalyze which type of reaction?
Trypsin catalyzes the cleavage of: a) all peptide bonds b) peptide bonds after Lys or Arg c) peptide bonds before Lys or Arg d) peptide bonds after Met Papain catalyzes the cleavage of: a) all peptide bonds b) peptide bonds after Lys or Arg c) peptide bonds before Lys or Arg d) peptide bonds after Met The molecule which binds to an enzyme and undergoes chemical reaction is called a: a) substrate b) cofactor c) coenzyme d) prosthetic group A metal ion which binds to an enzyme and assists it in catalysis is called: a) substrate b) cofactor c) coenzyme d) prosthetic group Proteases are a subclass of which larger class? A) isomerases b) oxidoreductases c) lyases d) hydrolases Transferases which catalyze the transfer of a phosphate group are called: a) lyases b) ligases c) kinases d) phosphatases
In a typical enzyme-catalyzed reaction, what are the relative concentrations of reactants and products as compared to the enzyme concentration?
Each of the following enzymes catalyzes what sort of reaction?citrate decarboxylase (a. citrate decarboxylase) (b. citrate decarboxyoxalate reductase (b)c. transaminase of serine
Consider the enzyme pancreatic amylase, which has an optimum pH of 7.0. How is the rate of a pancreatic amylase-catalyzed reaction affected by each of the following changes: (a) lowering the pH from 7 to 4; (b) increasing the pH from 7 to 9; (c) decreasing the temperature from 37 °C to 28 °C; (d) increasing the temperature from 37 °C to 50 °C?
What type of reaction takes place during catabolism of proteins?
Which one is transition and substrate state? What must be true of a and b in order for catalysis to occur?
Consider the analogy of the jiggling box containing coins that was described on page 85. The reaction, the flipping of coins that either face heads up (h) or tails up (T), is described by the equation h ↔ T, where the rate of the forward reaction equals the rate of the reverse reaction.a. What are ΔG and ΔG° in this analogy? b. What corresponds to the temperature at which the reaction proceeds? What corresponds to the activation energy of the reaction? assume you have an “enzyme,” called jigglase, which catalyzes this reaction. What would the effect of jigglase be and what, mechanically, might jigglase do in this analogy?
Does sn enzyme undergo any net chemical change?
Why are small concentrations of coenzymes sufficient to maintain enzyme activity?
in clinical chemistry, are enzymatic methods for determining glucose, cholesterol and uric acid more preferred than non-enzymatic methods?
What general effects would you expect the following changes to have on the rate of an enzyme-catalyzed reaction for an enzyme that has its maximum activity at body temperature (about 37 °C/310.15 K)?(a) Raising the temperature from 310 K (37 °C) to 343 K (70 °C)(b) Lowering the pH from 7 to 3(c) Adding an organic solvent, such as methanol

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