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2/2 chapt 5 bchm MC only
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2/2 chapt 5 bchm MC only

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Questions and Answers

According to the text, what does a Hill coefficient (nH) value of 1 indicate?

  • Ligand binding is not possible
  • Ligand binding is not cooperative (correct)
  • Positive cooperativity
  • Negative cooperativity

    • According to the text, what does a Hill coefficient (nH) value greater than 1 indicate?

  • Negative cooperativity
  • Positive cooperativity (correct)
  • Ligand binding is not cooperative
  • Ligand binding is not possible

    • According to the text, what does a Hill coefficient (nH) value less than 1 indicate?

  • Positive cooperativity
  • Negative cooperativity (correct)
  • Ligand binding is not cooperative
  • Ligand binding is not possible

    • According to the text, what is the MWC model also known as?

    <p>Concerted model</p> Signup and view all the answers

    According to the text, what is the sequential model also known as?

    <p>Sequential model</p> Signup and view all the answers

    According to the text, what is the function of carbonic anhydrase in relation to CO2 and pH?

    <p>Catalyzes the hydration of CO2 to bicarbonate</p> Signup and view all the answers

    Which type of antibody preparation contains a mixture of antibodies that recognize different parts of a protein?

    <p>Polyclonal antibodies</p> Signup and view all the answers

    Which type of antibody preparation is synthesized by a population of identical B cells and recognizes the same epitope?

    <p>Monoclonal antibodies</p> Signup and view all the answers

    Which proteins are the major components of muscle?

    <p>Actin and myosin</p> Signup and view all the answers

    What is the structure of thick filaments in muscle?

    <p>Rodlike structures of aggregated myosin</p> Signup and view all the answers

    What is the structure of thin filaments in muscle?

    <p>F-actin along with troponin and tropomyosin</p> Signup and view all the answers

    What is the attachment site for thin filaments in muscle?

    <p>Z disk</p> Signup and view all the answers

    Which class of antibodies is the major class and one of the most abundant blood serum proteins?

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

    What is the function of memory cells in the immune response?

    <p>Permit a rapid response to pathogens previously encountered</p> Signup and view all the answers

    What is the purpose of vaccines?

    <p>Teach the immune system what the viral particles look like</p> Signup and view all the answers

    Which protein blocks the myosin-binding sites on the thin filament?

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

    What is the role of T lymphocytes in the immune response?

    <p>Destroy infected host cells</p> Signup and view all the answers

    What is the role of troponin in muscle contraction?

    <p>Causes a conformational change and exposes myosin-binding sites</p> Signup and view all the answers

    What is the function of antibodies in the immune response?

    <p>Bind bacteria, viruses, or large molecules identified as foreign</p> Signup and view all the answers

    What is the role of subunit C in troponin?

    <p>Binds Ca2+</p> Signup and view all the answers

    What is the purpose of the humoral immune system?

    <p>Target bacterial infections and extracellular viruses</p> Signup and view all the answers

    What is the function of skeletal muscle?

    <p>Binding and catalysis</p> Signup and view all the answers

    What type of protein is myosin?

    <p>Actin-binding protein</p> Signup and view all the answers

    Is actin-myosin interaction reversible or irreversible?

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

    Which of the following describes the Bohr effect?

    <p>The effect of pH and [CO2] on the binding and release of O2 by hemoglobin</p> Signup and view all the answers

    Which of the following is true about the binding of H+ and CO2 to hemoglobin?

    <p>The binding of H+ and CO2 is inversely related to the binding of O2</p> Signup and view all the answers

    What is the role of 2,3-Bisphosphoglycerate (BPG) in the regulation of oxygen binding to hemoglobin?

    <p>It decreases the affinity of hemoglobin for oxygen</p> Signup and view all the answers

    How does sickle cell anemia differ from normal hemoglobin?

    <p>Sickle cell anemia forms polymers upon deoxygenation</p> Signup and view all the answers

    What is the effect of BPG on oxygen binding to hemoglobin at high altitudes?

    <p>BPG increases at high altitudes</p> Signup and view all the answers

    What is the role of fetal hemoglobin in oxygen binding?

    <p>Fetal hemoglobin has a higher affinity for oxygen</p> Signup and view all the answers

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