Catalysis and Enzyme Specificity

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Questions and Answers

What is the term for catalysis that occurs in solution?

  • Enzymatic catalysis
  • Heterogeneous catalysis
  • Biological catalysis
  • Homogeneous catalysis (correct)

What are biological catalysts called?

  • Molecules
  • Proteins
  • Enzymes (correct)
  • Substrates

What does enzyme specificity define?

  • The conformational changes in enzyme structure
  • The adduct formed by the physical adsorption of the substrate
  • The capacity to recognize and bind only one or a few molecules (correct)
  • The rate of synthesis and degradation

What are enzymes called due to the asymmetry of their active sites?

<p>Stereoselective (A)</p> Signup and view all the answers

How is enzymatic activity subject to control?

<p>Binding of small molecules that produce conformational changes in the enzyme structure (B)</p> Signup and view all the answers

What is the term for catalysis on an insoluble surface?

<p>Heterogeneous catalysis (B)</p> Signup and view all the answers

What is the complementary arrangement between the active site and substrate molecule referred to as?

<p>Lock-and-key fit (A)</p> Signup and view all the answers

What term is used to describe the capacity of a substrate to reshape the active site to bind tightly with high affinity?

<p>Induced fit (A)</p> Signup and view all the answers

What is the energy absorbed by reactant molecules before they have a chance to convert to products called?

<p>Free energy of activation (B)</p> Signup and view all the answers

What type of enzyme naming includes a designation of the type of reaction catalyzed?

<p>Systematic naming (B)</p> Signup and view all the answers

Enzymes that catalyze the same reaction but have different forms due to differences in amino acid sequences are referred to as:

<p>Isoenzymes (B)</p> Signup and view all the answers

What are low molecular weight organic molecules and inorganic ions that are required for catalysis referred to as?

<p>Cofactors (D)</p> Signup and view all the answers

What is the combination of a cofactor plus the protein portion known as?

<p>Holoenzyme (D)</p> Signup and view all the answers

What does the term 'trypsin' represent in enzyme nomenclature?

<p>Practical name (D)</p> Signup and view all the answers

Which naming is composed by citing the name of the substrate molecule and following that with the suffix, -ase?

<p>Systematic naming (D)</p> Signup and view all the answers

What is the most widely recognized isoenzyme based on?

<p>Electrophoretic migration (B)</p> Signup and view all the answers

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