chapter 23
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What name is given to the intermediate in an enzyme-catalyzed reaction? | Enzyme-substrate complete
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| Which of the following will cause the rate of enzyme activity to first increase and then level off? | increasing the substrate concentration.
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| Which of the following is the reason that trypsin is synthesized as trypsinogen? | trypsin would attack the body's natural proteins.
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| Which of the following is associated with noncompetitive inhibition? | allosterism
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| In which type of inhibition is it not possible to restore the maximum rate of enzyme activity by adding additional substrate? | noncompetitive inhibition
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| Which of the following is true? | the majority of enzymes are globular proteins.
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| In which type of inhibition is it possible to restore the maximum rate of enzyme activity by adding additional substrate? | Competitive inhibition.
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| Which of the following is true of enzymes? | both a and b, (think about what an enzyme does and what it is.)
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| What is the general name used when the product of a reaction sequence inhibits an earlier step in that sequence? | Feedback control
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| In Which type of inhibition does the inhibitor bind to the active site? | Competitive inhibition.
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| The names of enzymes are often derived from which of the following? | both a and b, (~where they catalyze an what they catalyze?)
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| Which of the following will cause the rate of enzyme activity to increase linearly? | increasing the enzyme concentration
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| Which of the following is commonly associated with protein modification? | Phosphorylation/dephosphorylation
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| Which of the following is true of all allosteric enzymes? | Binding at one site affects protein function at a second site.
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| Transition- state analogs do which of the following ? | all of the above,(mimics transition state of substrate
experimentally used to verify active site
clinically inhibit enzymes
used to design artificial enzymes.)
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| Which of the following is true of isozymes? | They are different forms of the same enzyme found in different tissues.
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| Which of the following can cause enzyme activity to either increase or decrease? | both a and b,(ph and temp?.)
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| What term is used to describe a species which affects the functioning of an allosteric enzyme? | regulator
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| Which of the following is used in diagnosing infectious hepatitis? | ALT (Alanine aminotransferase .)
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| which of the following explains why succinylcholine is used as a muscle relaxant? | it is slowly hydrolyzed by acetylcholinesterase
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| Which of the following is another name for a proenzyme? | Zymogen
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| Which of the following are monitored to diagnose the severity of a heart attack? | All of these. (AST,LDH,CPK,PHI)
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| What name is given to any (organic or inorganic) nonprotein portion of an enzyme? | cofactor
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| What name is given to the molecule on which the enzyme works? | substrate
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| In addition to proteins, which type of molecules sometimes function as enzymes? | RNA
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| Which of the following is a foreign substance that produces an immune response? | An antigen
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| In which type of inhibition does the inhibitor bind to the protein at a site other than the active site? | noncompetitive inhibition
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| What disease is diagnosed by monitoring amylase activity? | pancreatic disease
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| What disease is diagnosed by monitoring acid phosphatase activity? | prostate cancer
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| An abzyme is which of the following? | An antibody with catalytic ability
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| What is the name given to a material which slows down enzyme function? | Inhibitor
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| What name is given to the organic cofactor of an enzyme? | coenzyme
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anel
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