As humans age, the rate of cell division _____, which is intended to _______. Select one: a. increases, decrease the risk of cancer b. Decreases, decrease the risk of cancer c. Increases, increase stem cell division d. Decreases, increase stem cell division
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- 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 aboveWith 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.
- Cancer can arise spontaneously, but it can also be induced as a result of environmental factors such as sun exposure, infections, and tobacco smoking. If you were asked to help allocate resources to cancer research, what emphasis would you place on research to find cancer cures, compared to that placed on education about cancer prevention?Cancer cells can be characterized as “generic” cells thatperform no specialized body function. Thus cancer cellslack ________.a. differentiationb. reproductionc. responsivenessd. both reproduction and responsivenessWhich 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 grow
- Which is a.) Reduction of cancer risks b.) Correction of cancer genes or c.) Destruction of cancer tissues Only most likely choice for the followingWhich of the following statements is true? a. once a person reaches maturity, cell division stops unless it is to repair a wound b. cell division in an adult signifies cancer c. some specific cells throughout the body retain the ability to divide and replace themselves d. growth continues on throughout life of an adult humanFor cancer to occur in an individual which of the following must occur? a an accumulation of multiple mutations in many different cells b a deletion of part of a gene c an accumulation of multiple mutations in an individual cell d chromosomal segment deletions e triploidy
- Stargardt's disease was one of these that can be treated using embryonic stem cells. Why would scientist chose to use this type of stem cell in treatment of Stargard's? A. There ae not ethical issue concerning their use B. They retain stem cell properties even after specialization C. They are able to differentiate into the required cell type D. They are already specialized for this funtionA study on the effects of a new drug tamoxifen has stopped more than a year early because of dramatic findings. The American National institute of health reports that in a trial of 13 000 healthy women, there were 85 cases of breast cancer amongst the more than 6000 who were given tamoxifen compared to 154 in an equal number of women who Didi not get the drug. Dr Richard Klausher , director of the institute said only through continued research will we find drugs which are effective and with fewer side effects. It is said that women who were taking 'dummy' will be given a chance to take tamoxifen instead. 1. Write in your own words why you think the study was stopped early. 2. Explain the method used [ Be quantitative] 3. Summarize the results of the study [ Be quantitative] 4. Was this a well-designed study? Give two reasons 5. Which group of women served as placeboDescribe some differences between normal differentiated cellsand cancer cells.