The incidence of cancer ---- with age. a. increases b. decreases 8. Familial colon cancer --- Knudson’s two-hit hypothesis about cancer. a. supports b. defies please answer both.
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7. The incidence of cancer ---- with age.
a. increases b. decreases
8. Familial colon cancer --- Knudson’s two-hit hypothesis about cancer.
a. supports b. defies
please answer both.
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- When an invasive cancer occurs? A. When genetic mutation occurs in a cell B. Cells are abnormal and tumor are still in contained within its tissue of origin C. When cell's descendants mutated and divide excessively and look abnormal. D. When some cells have additional mutations and allow tumors to invade other tissues through circulatory system As a doctor, you observed that patient X has speech delay and taller than the normal person. You suspected that patient X has Klinefelter syndrome. What test should be done? A. Karyotype, to see whether he has 3 chromosomes in chromosome 21 that causes the order B. Karyotype, to see whether he has 3 chromosomes in chromosome 18 21 that causes the order. C. Fertility, because person with Klinefelter syndrome is sterile due to testicular atrophy and gynecomastia D. Fertility, because person with Klinefelter syndrome is infertile due to underdeveloped sexual characteristics Ben was asked by his teacher what happens if there is an uncontrolled…1. Many cancers can be found early if people would participate in early detection. say your opinion to why this doesn't happen?2. It is often the case that a predisposition to certain forms of cancer is inherited. An example is familial retinoblastoma. What does it mean to have inherited an increased probability of acquiring a certain form of cancer? What subsequent event(s) must occur?
- Which of the following must scientists understand in order to create effective cancer treatments? Select all that apply. a why cancer is difficult to treat b where cancer originated c how cancer cells multiply d how cancer cells growFigure 17.15 In 2011, the United States Preventative Services Task Force recommended against using the PSA test to screen healthy men for prostate cancer. Their recommendation is based on evidence that screening does not reduce the risk of death from prostate cancer. Prostate cancer often develops very slowly and does not cause problems, while the cancer treatment can have severe side effects. The PCA3 test is considered to be more accurate, but screening may still result in men who would not have been harmed by the cancer itself suffering side effects from treatment. What do you think? Should all healthy men be screened for prostate cancer using the PCA3 or PSA test? Should people in general be screened to find out if they have a genetic risk for cancer or other diseases?1. Why does v-sis only cause sarcomas but not originate other cancers in monkeys?
- The chapter points out that about one of every five women and one of every four men in the United States will die from cancer. Why arerates of death from cancer different in men and women? Provide some possible explanations. 3. A couple has one child with bilateral retinoblastoma. The mother is free from cancer, but the father has unilateral retinoblastoma and he has a brother who has bilateral retinoblastoma. a. If the couple has another child, what is the probability that this next child will have retinoblastoma? b. If the next child has retinoblastoma, is it likely to be bilateral or unilateral? c. Explain why the father’s case of retinoblastoma is unilateral, whereas his son’s and brother’s cases are bilateralDevelopment of cancer is a multi-step process; a.How does information on the onset of cancer agree with this hypothesis? b.How did data from human human affected with colon cancer support this hypothesis?Which of the following is not a characteristic of cancer cells? a. less cytoplasmic volume than normal cells b. an absence of cyclin c. loss of adhesion to other cells d. loss of control of cell division e. loss of normal control of G1/S phase transition
- Which of the following is not true of somatic cell gene therapy? a. White blood cells can be used. b. Somatic cells are cultured, and the desired DNA is introduced into them. c. Cells with the introduced DNA are returned to the body. d. The technique is still very experimental. e. The inserted genes are passed to the offspring.Which of the following factors contributes to angiogenesis as a result of a tumor growth? Select all that apply: a. Increasing tumor's access to oxygen and nutrients b. Increasing tumor's ability for growth, invasion, and metastasis c. Increasing expression of proto-oncogenes for cancer cells d. Increasing expression of tumor-suppressor genes for cancer cellsMost forms of cancer involvea. the activation of a single oncogene.b. the inactivation of a single tumor-suppressor gene.c. the activation of multiple oncogenes.d. the activation of multiple oncogenes and the inactivation ofmultiple tumor-suppressor genes.
