Allosteric Enzyme MCQ

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• Which of the following is not true of feedback allosteric inhibition in multienzyme system?
  ক

  First enzyme of the sequence is regulatory allosteric enzyme

  খ

  The enzyme is inhibited by the end product of the multienzyme system

  গ

  Allosteric enzymes obey Miachelis-Menten kinetics

  ঘ

  The whole enzyme system slows down to bring the rate of production of its end product back into balance when the cell needs it
• Which of the enzyme ATP does not act as an inhibitor?
  ক

  Isocitrate dehydrogenase

  খ

  Phosphofructokinase-1

  গ

  Glycogen phosphorylase

  ঘ

  Fructose-1,6- bisphosphatase
• Which of the following is not an inhibitor of pyruvate dehydrogenase in conversion pyruvate to acetyl CoA?
  ক

  Citrate

  খ

  ATP

  গ

  NADH

  ঘ

  Acetyl CoA
• What is represented in the diagram?
  ক

  Effect of temperature versus activity of enzyme

  খ

  Effect of pH versus activity of immobilized enzyme

  গ

  Effect of substrate concentration on reaction velocity for an allosteric enzyme

  ঘ

  Effect of temperature versus activity of allosteric enzyme
• ________ is referred to as effectors which increase the enzyme activity.
  ক

  Positive effectors

  খ

  Modifier

  গ

  Negative effectors

  ঘ

  Inhibitor
• Effectors that inhibit enzyme activity are termed as ____________
  ক

  positive effectors

  খ

  modulators

  গ

  negative effectors

  ঘ

  inhibitor
• The enzymes having allosteric sites, other than catalytic site which is used for binding for regulatory metabolites is referred to as _________
  ক

  isoenzyme

  খ

  biosensor

  গ

  allosteric enzymes

  ঘ

  effectors
• Which of the following is not true for allosteric enzyme?
  ক

  Greek word ‘allo’ means other and ‘steros’ means site

  খ

  Enzymes having other site

  গ

  Regulatory metabolites are called effector or modulator or modifier

  ঘ

  Each of two or more enzymes with identical function but different structure