Gen Bio 1 Homework 11 Flashcards
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Questions and Answers

Which of these is NOT a carcinogen? (Select all that apply)

  • Fat
  • UV light
  • Cigarette smoke
  • Testosterone
  • All of the above are carcinogens (correct)
  • _____ is a carcinogen that promotes colon cancer.

    fat

    One difference between cancer cells and normal cells is that cancer cells ______.

    continue to divide even when they are tightly packed together

    Why do neurons and some other specialized cells divide infrequently?

    <p>They have been shunted into G0.</p> Signup and view all the answers

    What could researchers conclude right away about a cultured cell line that did not exhibit density-dependent inhibition or anchorage dependence?

    <p>The cells show characteristics of tumors.</p> Signup and view all the answers

    For a chemotherapeutic drug to be useful for treating cancer cells, which of the following is most desirable?

    <p>It interferes with rapidly dividing cells.</p> Signup and view all the answers

    What is true of all cancers?

    <p>They have escaped normal cell cycle controls.</p> Signup and view all the answers

    Prior to this new technique, how were mice given cancerous tumors?

    <p>The tumors were implanted under the skin.</p> Signup and view all the answers

    What do you do when a patient presents with advanced prostate cancer and you follow standard protocol?

    <p>The patient is treated with chemical castration.</p> Signup and view all the answers

    What is true when a patient has an unusually large level of dihydrotestosterone?

    <p>Your patient's cancer has become resistant to the standard treatment.</p> Signup and view all the answers

    Which of the following is true regarding prostate cancer cells?

    <p>They can activate and inactivate certain genes.</p> Signup and view all the answers

    Which of the following indicates improvement in your uncle's prostate cancer condition?

    <p>A decreasing PSA.</p> Signup and view all the answers

    Women with the BRCA gene are at high risk for having aggressive types of breast and ovarian cancer.

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

    Women with certain mutated versions of the BRCA genes are at high risk for having aggressive types of breast and ovarian cancer.

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

    Everyone has the BRCA gene, even men.

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

    Genetic tests determine if you do or don't have the BRCA gene.

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

    Genetic tests determine what version of the BRCA gene you have.

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

    The normal version of the BRCA gene causes breast cancer.

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

    Study Notes

    Carcinogens and Cancer Cells

    • Carcinogens include substances like UV light, cigarette smoke, fat, and testosterone; all of these are linked to cancer.
    • Fat is specifically identified as a carcinogen promoting colon cancer.
    • Cancer cells differ from normal cells as they continue to divide even when densely packed.

    Cell Division and Specialized Cells

    • Neurons and specialized cells divide infrequently because they enter the G0 phase of the cell cycle, indicating a quiescent state.
    • Cell lines that do not exhibit density-dependent inhibition or anchorage dependence show characteristics of tumors.

    Chemotherapy and Cancer Treatment

    • Effective chemotherapeutic drugs target rapidly dividing cells to combat cancer.
    • All cancers share a commonality in that they have escaped normal cell cycle controls.

    Tumor Induction and Cancer Management

    • Tumors in mice were previously implanted under the skin for cancer studies.
    • In treating advanced prostate cancer, standard protocol involves chemical castration.

    Hormonal Influence and Cancer Resistance

    • High levels of dihydrotestosterone in prostate cancer patients suggest that their condition has become resistant to standard treatments.
    • Prostate cancer cells possess the ability to both activate and inactivate specific genes.

    Monitoring and Genetic Risks

    • Improvement in prostate cancer is indicated by a decreasing PSA (Prostate-Specific Antigen) level.
    • All individuals carry the BRCA gene, including men, but only certain mutated versions of this gene increase the risk of aggressive breast and ovarian cancers.
    • Genetic tests do not confirm the presence of the BRCA gene but can identify the version of the BRCA gene present. The normal BRCA gene does not cause breast cancer.

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    Test your knowledge of carcinogens and cancer cell characteristics with these flashcards from General Biology 1. Each card presents a question that will help reinforce your understanding of the material covered in class.

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