Proteins and Enzymes Quiz
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Questions and Answers

Proteins can be classified based on their shape or their composition. Which one of the following is an example of a fibrous protein?

  • Carrier proteins
  • Keratin
  • Collagen (correct)
  • Enzymes
  • Which one of the following is an example of a globular protein?

  • Collagen
  • Keratin
  • Enzymes (correct)
  • Carrier proteins
  • Which type of protein is often insoluble in water?

  • Globular proteins
  • Fibrous proteins (correct)
  • Compact and spherical proteins
  • Long and rod-shaped proteins
  • Which type of protein is composed of only amino acids?

    <p>Simple protein</p> Signup and view all the answers

    Which level of protein structure refers to the linear sequence of amino acids?

    <p>Primary</p> Signup and view all the answers

    Which type of secondary protein structure is often depicted schematically as a piece of curled ribbon?

    <p>Alpha helix</p> Signup and view all the answers

    What is the term for a protein composed of many subunits?

    <p>Multimer</p> Signup and view all the answers

    Which level of protein structure refers to the linear sequence of amino acids?

    <p>Primary structure</p> Signup and view all the answers

    Which type of protein is often insoluble in water?

    <p>Fibrous protein</p> Signup and view all the answers

    Which type of protein is composed of only amino acids?

    <p>All proteins</p> Signup and view all the answers

    Which type of secondary protein structure is often depicted schematically as a piece of curled ribbon?

    <p>Alpha helix</p> Signup and view all the answers

    What is the term for a protein composed of many subunits?

    <p>Multimer</p> Signup and view all the answers

    Which of the following is NOT a level of protein structure?

    <p>Primary</p> Signup and view all the answers

    Which of the following is an example of a conjugated protein?

    <p>Hemoglobin</p> Signup and view all the answers

    Which type of protein structure is formed by hydrogen bonds between distant carboxyl and amino groups?

    <p>Secondary</p> Signup and view all the answers

    Which of the following is an example of a protein that is held together by disulfide bonds?

    <p>Hemoglobin</p> Signup and view all the answers

    What is the term for a protein composed of two subunits?

    <p>Dimer</p> Signup and view all the answers

    Study Notes

    Protein Classification

    • Proteins can be classified based on their shape or composition.

    Protein Types

    • Fibrous proteins: example is collagen.
    • Globular proteins: example is hemoglobin.
    • Insoluble proteins in water: fibrous proteins.
    • Proteins composed of only amino acids: simple proteins.

    Protein Structure

    • Primary structure: refers to the linear sequence of amino acids.
    • Secondary structure: often depicted schematically as a piece of curled ribbon, formed by hydrogen bonds between distant carboxyl and amino groups (alpha helix or beta pleated sheet).
    • Tertiary and quaternary structures: formed by interactions between side chains (hydrophobic, ionic, and disulfide bonds).
    • Quaternary structure: term for a protein composed of many subunits.

    Conjugated Proteins

    • Example: hemoglobin (a protein with a non-protein component, heme).

    Protein Bonds

    • Disulfide bonds: hold proteins together, example is insulin.

    Protein Subunits

    • Oligomer: term for a protein composed of two or more subunits (monomers).
    • Dimer: term for a protein composed of two subunits.

    Non-Protein Structure Level

    • Evolutionary relationships: NOT a level of protein structure.

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    Description

    Test your knowledge on proteins and enzymes with this quiz! Learn about protein classification, structure, denaturation, and the general properties and mechanisms of enzymes. Explore topics such as acid-base and covalent catalysis, cofactors and coenzymes, and the effects of temperature and pH on enzyme activity.

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