Exam 3A 34) Data on Japanese immigrants suggest A) inheritance plays a large rol

Question

Exam 3A 34) Data on Japanese immigrants suggest A) inheritance plays a large role in determining cancer risks. B) p53 can mutate quickly C) environment plays a large role in determining cancer risks. D) the U.S. is a healthier place to live than Japan. E) translocations are more common in first-generation immigrants. 35) p53 A) can trigger cell death if the DNA is too badly damaged. B) will inhibit the cell cycle before DNA replication. C) will inhibit the cell cycle after DNA replication. D) A and B. E) A and C 36) Cancer arises A) when a proto-oncogene mutates to an oncogene. B) when a tumor suppressor gene mutates to an active tumor suppressor. C) when a tumor suppressor gene mutates to a less active tumor suppressor. D) when a normal cell undergoes critical mutations in cell-cycle control genes. E) A, C and D. 37) Tars found in tobacco A) increase the rate of mutations in cells. B) increase the risk of lung cancer C) increase the risk of oral cancer. D) increase the risk of pancreatic cancer E) all of the above. 38) Carcinogens contribute to the formation of cancer by A) causing mutations to occur. Without them, our bodies would never have any mutations. B) increasing the number of random mutations that can occur in cells in the body. C) causing mutations only in the cell cycle control genes. D) causing cells to differentiate. E) generating radiation. Choose from the following to answer questions 39 - 42 below A) Carcinoma B) Adenoma C) Metastasis D) Angiogenesis E) Dysplasia 39) Which of the above is a benign tumori 40) Which of the above describes new cancers forming in different areas of the body from where it originated? 41) Which of the above is an early stage of a potential cancer and not a tumor? 42) Which of the above is a malignancy

Explanation / Answer

34. more data required to answer it.

35. Answe is option E.

p53 is a tumor supressor gene which protects us from cancer. It can direct the cel to apoptosis if the DNA is damaged beyond repair.

36. Answer is option E.

Proto-oncogene when converted to oncogene causes cancer.

tumor supressor gene supresses oncogenes and proto oncogenes

cell mutations leads to cancer

37. Answer is option B.

Tars is a carcinogenic compound which is known to cause lung cancer.

38. Answer is option B.

Cancer is due to random mutation in a gene that may be a proto oncogene/tumor supresor gene which causes them activate/deactivate respectively.

39. B. Adenoma

40. C. Metastasis

41. Early stage of a potential cancer and not a tumor - B. Adenoma

42 Malignancy- A. Carcinoma

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