Consider a hypothetical metabolic pathway involving four enzymes to convert molecule A into molecule E: Enz 1 Enz 2 Enz 3 Enz 4 C D B Which molecule is most likely to be a feedback inhibitor that, when present in high concentrations, will reduce the flow of material through the pathway? 01) A A O2) B (3) C 04) D 05) E 6) none of these E The activity of an allosteric enzyme will be greatest when 1) the pH is optimal for the enzyme. 2) most of the enzyme molecules are in the R conformation. 3) most of the enzyme molecules are in the T conformation. 4) there are equal numbers of enzyme molecules in the R and T conformations. un puIILS What will be the effect on the structure of an allosteric enzyme if a negative allosteric effector is added to a solution of the enzyme? 1) There will be a shift in the equilibrium between the R and T forms; the amount of T will increase. 2) There will be a shift in the equilibrium between the R and T forms; the amount of R will increase. 3) The enzyme will be denatured. 4) There will be a change in the primary structure of the enzyme.

Consider a hypothetical metabolic pathway involving four enzymes to convert molecule A into molecule E: Enz 1 Enz 2 Enz 3 Enz 4 C D B Which molecule is most likely to be a feedback inhibitor that, when present in high concentrations, will reduce the flow of material through the pathway? 01) A A O2) B (3) C 04) D 05) E 6) none of these E The activity of an allosteric enzyme will be greatest when 1) the pH is optimal for the enzyme. 2) most of the enzyme molecules are in the R conformation. 3) most of the enzyme molecules are in the T conformation. 4) there are equal numbers of enzyme molecules in the R and T conformations. un puIILS What will be the effect on the structure of an allosteric enzyme if a negative allosteric effector is added to a solution of the enzyme? 1) There will be a shift in the equilibrium between the R and T forms; the amount of T will increase. 2) There will be a shift in the equilibrium between the R and T forms; the amount of R will increase. 3) The enzyme will be denatured. 4) There will be a change in the primary structure of the enzyme.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter4: How Cells Obtain Energy

Section: Chapter Questions

Problem 20CTQ: Would you describe metabolic pathways as inherently wasteful or inherently economical, and why?

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