Enzymes in Biochemistry
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Questions and Answers

What is a simple enzyme composed of?

  • Nonmetallic ions
  • Dietary minerals
  • Protein and a nonprotein part
  • Only protein (amino acid chains) (correct)

    • Which part does not have catalytic properties in a conjugated enzyme?

  • Cofactor
  • The combination of apoenzyme with cofactor (correct)
  • Apoenzyme
  • The protein part

    • What combination produces a holoenzyme?

  • Protein part + cofactor
  • Apoenzyme + cofactor (correct)
  • Apoenzyme + nonprotein part
  • Protein part + organic molecule

    • What do cofactors provide in addition to amino acid side chains in apoenzymes?

    <p>Additional chemically reactive functional groups</p> Signup and view all the answers

    Which of the following is a typical inorganic ion cofactor?

    <p>$ ext{Zn}^{2+}$</p> Signup and view all the answers

    What is the role of a coenzyme in a conjugated enzyme?

    <p>Functions as a cofactor</p> Signup and view all the answers

    Which of the following is NOT a focal point for the nomenclature of enzymes?

    <p>The structure of the enzyme</p> Signup and view all the answers

    Which of the following is a characteristic of enzyme specificity?

    <p>Enzymes have a very high affinity for their substrates</p> Signup and view all the answers

    Which of the following is a factor that can affect enzyme activity?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of enzyme inhibition?

    <p>To regulate the activity of the enzyme</p> Signup and view all the answers

    What is the role of allosteric enzymes in the regulation of enzyme activity?

    <p>Allosteric enzymes can be both activated and inhibited by the binding of regulatory molecules</p> Signup and view all the answers

    What is the function of proteolytic enzymes and zymogens in the regulation of enzyme activity?

    <p>Both b and c are correct</p> Signup and view all the answers

    What is the primary function of enzymes in the human body?

    <p>To catalyze biochemical reactions and increase their rate</p> Signup and view all the answers

    How do enzymes affect the rate of cellular reactions?

    <p>Enzymes decrease the activation energy required for the reaction to occur</p> Signup and view all the answers

    What is the primary factor that can lead to enzyme denaturation?

    <p>Increases in pH</p> Signup and view all the answers

    What is the relationship between enzyme structure and function?

    <p>Enzyme structure is crucial for its specific catalytic activity</p> Signup and view all the answers

    Which of the following is the most important consideration when handling enzymes in a laboratory setting?

    <p>Avoiding contamination</p> Signup and view all the answers

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