Antibodies and Immune System Proteins
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Questions and Answers

What is the main difference between the various antibody classes?

  • Their function in the immune system
  • Their specificity
  • Their mechanism of destroying antigens (correct)
  • Their polypeptide structure

    • What is the primary function of the variable region of an antibody?

  • Determining the mechanism of destroying antigens
  • Regulating the immune response
  • Providing structural support to the antibody
  • Giving the antibody specificity (correct)

    • What is the characteristic shape of an antibody molecule?

  • Linear
  • Circular
  • Oval
  • Y-shaped (correct)

    • How many polypeptides make up an antibody molecule?

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

    What is the name of the proteins that antibodies are classified as?

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

    What is the primary function of the region at the tips of the 'Y' shaped antibody molecule?

    <p>Giving the antibody its specificity</p> Signup and view all the answers

    How many amino acids are present in the variable region of an antibody?

    <p>110-130</p> Signup and view all the answers

    What determines the immune function of an antibody?

    <p>Constant region structure</p> Signup and view all the answers

    How many major classes of antibodies are there?

    <p>5</p> Signup and view all the answers

    What is the role of the constant region of an antibody?

    <p>Determining the mechanism used to destroy antigens</p> Signup and view all the answers

    Study Notes

    Antibody Structure

    • Antibodies are proteins called immunoglobulins, consisting of four polypeptides: two heavy chains and two light chains, forming a "Y" shaped molecule.

    Antibody Specificity

    • The amino acid sequence at the tips of the "Y" shape (110-130 amino acids) varies among different antibodies, giving each antibody its specificity.

    Antibody Function

    • The constant region of an antibody determines the mechanism used to destroy antigens.

    Antibody Classification

    • Antibodies are divided into 5 major classes: IgM, IgG, IgA, IgD, and IgE, based on their constant region structure and immune function.

    Antibody Structure

    • Antibodies are proteins called immunoglobulins, consisting of four polypeptides: two heavy chains and two light chains, forming a "Y" shaped molecule.

    Antibody Specificity

    • The amino acid sequence at the tips of the "Y" shape (110-130 amino acids) varies among different antibodies, giving each antibody its specificity.

    Antibody Function

    • The constant region of an antibody determines the mechanism used to destroy antigens.

    Antibody Classification

    • Antibodies are divided into 5 major classes: IgM, IgG, IgA, IgD, and IgE, based on their constant region structure and immune function.

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    Description

    This quiz covers the structure and function of antibodies, including their composition, variability, and role in the immune system. It also explores the different classes of antibodies and their mechanisms of action.

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