Why would the failure of the p53 tumor supressor gene be more likely to cause cancer in a seventy year old person compared to a ten year old person?
Q: Why would the failure of the p53 tumor supressor gene be more likely to cause cancer in a seventy…
A: p53 is a tumor suppressor gene which regulates cell cycle.
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Why would the failure of the p53 tumor supressor gene be more likely to cause cancer in a seventy year old person compared to a ten year old person?
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- A tumor suppressor protein, p21, inhibits Cdk1. The earliest effect p21 on the cell cycle would be to stop the cell cycle at: a. early G1. b. late G1. c. the S phase. d. G2. e. the mitotic prophase.Which of the following statements about cancer is false? (a) oncogenes arise from mutations in proto-oncogenes (b) tumor suppressor genes normally interact with growth-inhibiting factors to block cell division (c) more than 120 cancer-driving genes have been discovered (d) oncogenes were first discovered in mouse models for cancer (e) the development of cancer is usually a multistep process involving both oncogenes and mutated tumor suppressor genesWith regard to cancer cells, which of the following statementsare true?A. Cancer cells are clonal, which means they are derived from asingle mutant cell.B. To become cancerous, cells usually accumulate multiplegenetic changes that eventually result in uncontrolledgrowth.C. Most cancers are caused by oncogenic viruses.D. Cancer cells have lost the ability to properly regulate celldivision.
- Which of the following would improve an individual's ability to cancer while aging?: a. decreases DNA repair accuracy during mitosisb. makes him smaller (e.g., fewer total cells)c. Increase the rate of mitosisd. increases his number of copies of p53e. all of the abovef. none of the aboveWhich of the following would improve an individual's ability to avoid cancer while aging?: a. decreases DNA repair accuracy during mitosisb. makes him smaller (e.g., fewer total cells)c. Increase the rate of mitosisd. increases his number of copies of p53e. all of the abovef. none of the aboveWhy would the failure of the p53 tumor supressor gene be more likely to cause cancer in a seventy year old person compared to a ten year old person? Group of answer choices A) The seventy year old is more likely to have pre-existing failures in cell cycle control B) cells divide more rapidly as people get older C) there are fewer mutations in genes controlling the cell cycle in older people D)the p53 gene never works well in old people
- What is a primary function of tumor suppressor genes?a. stop all cells from dividingb. stop certain cells from dividingc. help oncogenes produce oncoproteinsd. allow the cell to skip certain phases of the cellcycleBreast cancer is one of the most common cancers among women. The exact cause of breast cancer is unknown, and very few women will know the reason why they got it. We do know that breast cancer is always caused by damage to DNA. When the cell’s DNA is damaged, mutated cells begin to grow uncontrollably. These abnormal cells can progress into a disease such as breast cancer. Women with certain risk factors are more likely to get breast cancer than others. Some risk factors caused by the environment can be avoided, while others, such as family history, cannot. Below are three different women’s stories and their history in relation to breast cancer. Read each scenario and familiarize yourself with each one. For additional background, you can refer to the following website: http://www.nationalbreastcancer.org. Scenario 1: Jennifer is a 40-year-old Caucasian woman who has a history of breast cancer in her family. Her grandmother and mom both had breast cancer. This prompted Jennifer to have…Which of the following mutations is MOST likely to cause cancer? A) a mutation that causes a cyclin gene to be expressed at all times during the cell cycle B) a mutation that causes an oncogene to be turned off so that no protein is made C) a mutation that causes a Cdk gene to be turned off so that no protein is made D) a mutation that causes a tumor suppressor gene to be over-expressed
- Much remains unknown about the rapid, uncontrolled growth, or what causes a tumor to metastasize. Scientists do know that cancer cells come from normal healthy cells that have had some type of damage done to the genes that aid in the production of the regulatory proteins for the cell cycle. What causes this damage? a proto-oncogenes b mutations c enzymes d tumor suppressorsWhen 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…Which of the following is typical of cancer cells? A. The parent cell of the tumor contains a single mutation in a single checkpoint gene. B. Malignant cells migrate. C. Cancer cells lose the ability to divide. D. Products of oncogenes inhibit mitosis E. Benign tumors invade normal tissue.
