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Enzyme: Quiz


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Question 1: Many ________ and poisons are enzyme inhibitors.
DrugMDMAPhencyclidinePsychoactive drug

Question 2: [53] Their work was further developed by G. E. Briggs and ________, who derived kinetic equations that are still widely used today.
Natural selectionRonald FisherJ. B. S. HaldaneSewall Wright

Question 3: E.g. Glucose isomerase, used industrially to convert glucose into the sweetener ________, is a xylose isomerase in vivo.

Question 4: What does the following picture show?

  Mechanism for a single substrate enzyme catalyzed reaction. The enzyme (E) binds a substrate (S) and produces a product (P).
  Eduard Buchner
  Allosteric transition of an enzyme between R and T states, stabilized by an agonist, an inhibitor and a substrate (the MWC model)

Question 5: For example, flavin and heme cofactors are often involved in ________ reactions.

Question 6: They are indispensable for signal transduction and cell regulation, often via kinases and ________.
Phospholipase A2CholinesterasePhosphataseLipase

Question 7: The rate data used in kinetic analyses are obtained from ________.
InflammationEnzyme assayChromatographyImmunohistochemistry

Question 8: Enzyme Structures Database links to the known 3-D structure data of enzymes in the ________.
Protein nuclear magnetic resonance spectroscopyProtein structureProtein Data BankX-ray crystallography

Question 9: For example, ________ catalyzes its reaction in either direction depending on the concentration of its reactants.
Cystathionine beta synthaseTryptophan synthaseFumaraseCarbonic anhydrase

Question 10: What does the following picture show?

  Germinating barley used for malt.
  Ribbon diagram showing human carbonic anhydrase II. The grey sphere is the zinc cofactor in the active site. Diagram drawn from PDB 1MOO.
  Mechanism for a single substrate enzyme catalyzed reaction. The enzyme (E) binds a substrate (S) and produces a product (P).
  Human glyoxalase I. Two zinc ions that are needed for the enzyme to catalyze its reaction are shown as purple spheres, and an enzyme inhibitor called S-hexylglutathione is shown as a space-filling model, filling the two active sites.

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