Genetics Mutations Quiz
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Questions and Answers

What is the primary function of oncogenes in the context of cancer development?

  • Promote the growth of cancer cells (correct)
  • Activate the immune response against cancer cells
  • Suppress the proliferation of cancer cells
  • Repair damaged DNA in cancer cells
  • How do tumor-suppressor genes contribute to preventing cancer development?

  • They promote mutations in cancer cells
  • They repair damaged DNA in cancer cells
  • They inhibit the proliferation of cancer cells (correct)
  • They stimulate the growth of cancer cells
  • Which gene is commonly associated with retinoblastoma, a tumor of the retina?

  • BRCA1 gene
  • RB1 gene (correct)
  • BRAF gene
  • p53 gene
  • What happens when tumor-suppressor genes are inactivated by mutation?

    <p>It increases the likelihood of cancer development</p> Signup and view all the answers

    In individuals with inherited retinoblastoma, when does the disease typically occur?

    <p>In the early years of life</p> Signup and view all the answers

    What type of genes are proto-oncogenes before they undergo mutation?

    <p>Responsible for basic cellular functions in normal cells</p> Signup and view all the answers

    Which gene facilitates apoptosis by promoting programmed cell death?

    <p>p53</p> Signup and view all the answers

    What is the main effect of tumor-suppressor genes when functioning normally?

    <p>Inhibiting cancer development</p> Signup and view all the answers

    Which proteins fall into the category of maintaining genome integrity as tumor-suppressor genes?

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

    What happens to tumor-suppressor genes when they lose their ability to inhibit cancer?

    <p>They become oncogenes</p> Signup and view all the answers

    Which proteins control the cell cycle by regulating the G1-to-S transition?

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

    What is the main role of the spindle assembly checkpoint in the cell cycle?

    <p>Ensuring proper chromosome alignment during mitosis</p> Signup and view all the answers

    What is the predisposition for developing cancer often a result of?

    <p>Being heterozygous for tumor-suppressor genes</p> Signup and view all the answers

    Which term describes the phenomenon where cancer results from the loss of the normal copy of a gene?

    <p>Loss of heterozygosity</p> Signup and view all the answers

    Which gene is NOT listed among the examples of tumor-suppressor genes in the text?

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

    Inherited forms of cancer most commonly involve defects in which type of genes?

    <p>Tumor-suppressor genes</p> Signup and view all the answers

    What does LOH stand for in the context of cancer development?

    <p>Loss of Heterozygosity</p> Signup and view all the answers

    Which of the following is NOT mentioned as an example of a tumor-suppressor gene in the text?

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

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