1. The allosteric inhibitor of an enzyme a) Causes the enzyme to work faster b) Binds to the active site c) Participates in feedback regulation d) Denatures the enzyme
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- An allosteric inhibitor does which of the following? a. Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding. b. Binds to the active site and blocks it from binding substrate. c. Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate. d. Binds directly to the active site and mimics the substrate.An inhibitor that reversibly binds to a site other than the enzyme's active site is called a(n) a. noncompetitive inhibitor b. competitive inhibitor c. antagonisitc inhibitor d. antibioticWhy is an enzyme considered "specific"? A. Only one type of enzyme is found in our bodies B. Only certain enzymes can pass through the cell membrane C. Its active site must match the substrate to do its job D. The enzyme can only move from high to low concentration
- An allosteric site is the location on an enzyme’s surface wherea. the substrate binds.b. the signal molecule binds.c. catalysis takes place.d. ATP binds.Factors that affect the activity of an enzyme molecule includea. the potential energy stored in the reactant molecules.b. size of the cell.c. temperature and pH.d. entropyIn the following reaction, which is/are substrate(s), enzyme, products, allosteric inhibitor(s), negative regulator(s), and reactant(s)? Z A + B → C +D
- What is true about a competitive inhibitor of an enzyme? You can choose more than one a. it binds the active site b. it binds an allosteric site c. it physically blocks the substrate d. it warps the active site e. it can be overcome with large amounts of substrateWhich of the following statement regarding enzymes is false? a.) they speed up reaction rates b.) they work within narrow temperature and pH ranges c.) The active site binds the substarate d.) They are consumed in the reactions they catalyzeWhich of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.
- ________ are always changed by participating in a reaction. a. Enzymes c. Reactants b. Cofactors d. CoenzymesThe mechanism in which the end product of a metabolic pathway inhibits an either step in the pathway is known as A. Reversible inhibition B. Metabolic inhibition C. Feedback inhibition D. Allosteric inhibition E. Noncoopetative inhibitionthe type of enzyme inhibition in which covalent bulky adduct prevents catalysis is ? a) uncompetitive b) reversible c) noncompetitive d) competitive e) Irreversible
