Biomed II Exam II Lecture 1

18 Questions | Total Attempts: 51

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Lecture Quizzes & Trivia

Questions and Answers
  • 1. 
    Which Statement is TRUE?
    • A. 

      Hemocytoblasts are multipotent hematopoietic stem cells

    • B. 

      A blastocyst is the ultimate stem cell

    • C. 

      Telomeres extend for 20,000 bases in humans

    • D. 

      Telomeres lose 700 bases with each cell division

  • 2. 
    What percent of tumors have telomerase?
    • A. 

      75%

    • B. 

      60%

    • C. 

      80%

    • D. 

      85%

  • 3. 
    Which of the following is FALSE?
    • A. 

      Telomerase can replenish telomeres to allow for continued replication of special cells (this is seen in germ cells and stem cells)

    • B. 

      As we age, telomeres get longer, sending cells into senescence

    • C. 

      Stem cells can not migrate which is a key trait of cancer

    • D. 

      Stem cells are in almost all tissue

  • 4. 
    Benign tumor=cancer
    • A. 

      True

    • B. 

      False

  • 5. 
    Which of the following is TRUE?
    • A. 

      Inherited mutations are less likely the sole cause of cancer

    • B. 

      Acquired mutations are less likely the sole cause of cancer

    • C. 

      The cause of a tumor is 75% inherited

    • D. 

      Epstein-barr is a liver cancer

  • 6. 
    The causes of tumors are _____% Environmental
    • A. 

      25

    • B. 

      85

    • C. 

      75

    • D. 

      65

  • 7. 
    Select the FALSE statements:
    • A. 

      Smoking causes lung cancer

    • B. 

      Carcinogens in food causes lung cancer

    • C. 

      Radon causes colon cancer

    • D. 

      Asbestos causes lung cancer

  • 8. 
    Which cells replicate a lot?
    • A. 

      Cells lining the colon

    • B. 

      Skin cells

    • C. 

      Muscle cells

    • D. 

      Neurons

  • 9. 
    Brain cancer is cancer of ____cells
  • 10. 
    Which is TRUE?
    • A. 

      Ras stimulates cell death

    • B. 

      EGF binds to EGFR

    • C. 

      EGF binds to Ras

    • D. 

      ETFR activates ras protein

  • 11. 
    Overstimulation of ras causes cancers of:
    • A. 

      Breast

    • B. 

      Liver

    • C. 

      Ovary

    • D. 

      Stomach

  • 12. 
    Large amounts of unrepairable DNA damage activates:
    • A. 

      P16

    • B. 

      BRCA1/BRCA2

    • C. 

      P53

    • D. 

      BRCA1/BRCA2/BRCA3

  • 13. 
    Activation of normal p53 leads to cell cycle arrest in G1 and induction of DNA repair by transcriptional up-regulation of: 
    • A. 

      GADD45

    • B. 

      P16

    • C. 

      CDKN1A (p21)

    • D. 

      Cb3

  • 14. 
    P53 is most frequently mutated gene in human cancer
    • A. 

      True

    • B. 

      False

  • 15. 
    Which statement is TRUE?
    • A. 

      Humans have the most apoptotic cells in vitro in response to radiation

    • B. 

      Elephants have 2 copies of p53 gene

    • C. 

      Humans missing p53 copy have over 90% lifetime risk of cancer

    • D. 

      Elephants have fewest apoptotic cells

  • 16. 
    Cells without nuclei and DNA are removed by the:
    • A. 

      Kidneys

    • B. 

      Liver

    • C. 

      Small intestines

    • D. 

      Lungs

  • 17. 
    What is true of necrosis:
    • A. 

      Blobs fuse and become larger

    • B. 

      Organelles located in the blobs

    • C. 

      Organelles are not functional

    • D. 

      Organelles are functional

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