{"id":1121,"date":"2025-09-23T17:32:49","date_gmt":"2025-09-23T17:32:49","guid":{"rendered":"https:\/\/pressbooks.hcfl.edu\/bio1\/?post_type=chapter&p=1121"},"modified":"2025-09-23T17:32:49","modified_gmt":"2025-09-23T17:32:49","slug":"review-questions-9","status":"publish","type":"chapter","link":"https:\/\/pressbooks.hcfl.edu\/bio1\/chapter\/review-questions-9\/","title":{"raw":"Review Questions","rendered":"Review Questions"},"content":{"raw":"
    \r\n \t
  1. \r\n

    Which of the following best describes the role of cell signaling<\/strong>?
    A) To produce ATP for energy
    B) To allow cells to detect and respond to signals in their environment
    C) To replicate DNA before cell division
    D) To maintain chromosome structure<\/p>\r\n<\/li>\r\n \t

  2. \r\n

    Fill in the blank: A molecule that binds to a receptor and triggers a response is called a __________.<\/p>\r\n<\/li>\r\n \t

  3. \r\n

    Which of the following is an example of a G-protein coupled receptor (GPCR)<\/strong>?
    A) Insulin receptor
    B) \u03b2-adrenergic receptor
    C) Estrogen receptor
    D) Epidermal growth factor receptor (EGFR)<\/p>\r\n<\/li>\r\n \t

  4. \r\n

    True or False: GPCRs typically activate intracellular signaling through the binding and hydrolysis of GTP.<\/p>\r\n<\/li>\r\n \t

  5. \r\n

    Match the receptor type (Column A) with its main characteristic (Column B):<\/p>\r\n\r\n

      \r\n \t
    1. \r\n

      Column A<\/strong><\/p>\r\n\r\n

        \r\n \t
      1. \r\n

        GPCR (G-protein coupled receptor)<\/p>\r\n<\/li>\r\n \t

      2. \r\n

        RTK (Receptor Tyrosine Kinase)<\/p>\r\n<\/li>\r\n \t

      3. \r\n

        Steroid receptor<\/p>\r\n<\/li>\r\n \t

      4. \r\n

        Ligand-gated ion channel<\/p>\r\n<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t

      5. \r\n

        Column B<\/strong>
        A. Located inside the cell; activated by small hydrophobic ligands like hormones
        B. Opens to allow ions to pass through membrane when ligand binds
        C. Crosses membrane 7 times; activates G-proteins
        D. Dimerizes and autophosphorylates tyrosine residues<\/p>\r\n<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t

      6. \r\n

        Fill in the blank: When steroid hormones bind their receptors, the receptor-ligand complex acts as a __________ factor.<\/p>\r\n<\/li>\r\n \t

      7. \r\n

        Explain the difference between endocrine, paracrine, autocrine, and synaptic signaling<\/strong>.<\/p>\r\n<\/li>\r\n \t

      8. \r\n

        Which of the following is a second messenger commonly used in cell signaling pathways?
        A) cAMP
        B) DNA
        C) RNA
        D) ATP synthase<\/p>\r\n<\/li>\r\n \t

      9. \r\n

        Short answer: Why is signal amplification important in cell communication pathways?<\/p>\r\n<\/li>\r\n \t

      10. \r\n

        Fill in the blank: RTKs, once activated, phosphorylate __________ residues on themselves and other proteins to propagate the signal.<\/p>\r\n<\/li>\r\n \t

      11. \r\n

        Which of the following receptors directly alters gene expression without the need for second messengers?
        A) GPCR
        B) RTK
        C) Steroid receptor
        D) Ligand-gated ion channel<\/p>\r\n<\/li>\r\n \t

      12. \r\n

        Describe the role of phosphatases in signal transduction.<\/p>\r\n<\/li>\r\n \t

      13. \r\n

        Application: If a mutation prevents a GPCR from binding GTP, what would happen to the downstream signaling pathway?<\/p>\r\n<\/li>\r\n \t

      14. \r\n

        What is apoptosis, and why is cell signaling important in regulating it?<\/p>\r\n<\/li>\r\n \t

      15. \r\n

        Short answer: Compare how hydrophilic and hydrophobic signaling molecules differ in their receptor locations and mechanisms of action.<\/p>\r\n<\/li>\r\n<\/ol>","rendered":"

          \n
        1. \n

          Which of the following best describes the role of cell signaling<\/strong>?
          A) To produce ATP for energy
          B) To allow cells to detect and respond to signals in their environment
          C) To replicate DNA before cell division
          D) To maintain chromosome structure<\/p>\n<\/li>\n

        2. \n

          Fill in the blank: A molecule that binds to a receptor and triggers a response is called a __________.<\/p>\n<\/li>\n

        3. \n

          Which of the following is an example of a G-protein coupled receptor (GPCR)<\/strong>?
          A) Insulin receptor
          B) \u03b2-adrenergic receptor
          C) Estrogen receptor
          D) Epidermal growth factor receptor (EGFR)<\/p>\n<\/li>\n

        4. \n

          True or False: GPCRs typically activate intracellular signaling through the binding and hydrolysis of GTP.<\/p>\n<\/li>\n

        5. \n

          Match the receptor type (Column A) with its main characteristic (Column B):<\/p>\n

            \n
          1. \n

            Column A<\/strong><\/p>\n

              \n
            1. \n

              GPCR (G-protein coupled receptor)<\/p>\n<\/li>\n

            2. \n

              RTK (Receptor Tyrosine Kinase)<\/p>\n<\/li>\n

            3. \n

              Steroid receptor<\/p>\n<\/li>\n

            4. \n

              Ligand-gated ion channel<\/p>\n<\/li>\n<\/ol>\n<\/li>\n

            5. \n

              Column B<\/strong>
              A. Located inside the cell; activated by small hydrophobic ligands like hormones
              B. Opens to allow ions to pass through membrane when ligand binds
              C. Crosses membrane 7 times; activates G-proteins
              D. Dimerizes and autophosphorylates tyrosine residues<\/p>\n<\/li>\n<\/ol>\n<\/li>\n

            6. \n

              Fill in the blank: When steroid hormones bind their receptors, the receptor-ligand complex acts as a __________ factor.<\/p>\n<\/li>\n

            7. \n

              Explain the difference between endocrine, paracrine, autocrine, and synaptic signaling<\/strong>.<\/p>\n<\/li>\n

            8. \n

              Which of the following is a second messenger commonly used in cell signaling pathways?
              A) cAMP
              B) DNA
              C) RNA
              D) ATP synthase<\/p>\n<\/li>\n

            9. \n

              Short answer: Why is signal amplification important in cell communication pathways?<\/p>\n<\/li>\n

            10. \n

              Fill in the blank: RTKs, once activated, phosphorylate __________ residues on themselves and other proteins to propagate the signal.<\/p>\n<\/li>\n

            11. \n

              Which of the following receptors directly alters gene expression without the need for second messengers?
              A) GPCR
              B) RTK
              C) Steroid receptor
              D) Ligand-gated ion channel<\/p>\n<\/li>\n

            12. \n

              Describe the role of phosphatases in signal transduction.<\/p>\n<\/li>\n

            13. \n

              Application: If a mutation prevents a GPCR from binding GTP, what would happen to the downstream signaling pathway?<\/p>\n<\/li>\n

            14. \n

              What is apoptosis, and why is cell signaling important in regulating it?<\/p>\n<\/li>\n

            15. \n

              Short answer: Compare how hydrophilic and hydrophobic signaling molecules differ in their receptor locations and mechanisms of action.<\/p>\n<\/li>\n<\/ol>\n","protected":false},"author":130,"menu_order":6,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-1121","chapter","type-chapter","status-publish","hentry"],"part":731,"_links":{"self":[{"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/pressbooks\/v2\/chapters\/1121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/wp\/v2\/users\/130"}],"version-history":[{"count":1,"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/pressbooks\/v2\/chapters\/1121\/revisions"}],"predecessor-version":[{"id":1122,"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/pressbooks\/v2\/chapters\/1121\/revisions\/1122"}],"part":[{"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/pressbooks\/v2\/parts\/731"}],"metadata":[{"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/pressbooks\/v2\/chapters\/1121\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/wp\/v2\/media?parent=1121"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/pressbooks\/v2\/chapter-type?post=1121"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/wp\/v2\/contributor?post=1121"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.hcfl.edu\/bio1\/wp-json\/wp\/v2\/license?post=1121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}