Cancer Practice Questions

This percentage of all cancers in the United States could be attributed to environmental factors.
1. 25%
2. 60%
3. 75%
4. 90%
Concerning the etiologic role of environmental factors in cancer causation, which one(s) of the following assertions is correct?
1. The time interval exposure to a carcinogen and a cancer diagnosis is typically years, or even multiple decades.
2. Carcinogens typically induce cancer and about 60% of exposed persons.
3. Only through retrospective analysis can the amount of carcinogen exposure to be analytically quantified.
4. A & B
5. All of the above assertions are correct.
Which one(s) of the following relationships is/are correct?
1. Hepatitis B and C viruses and liver cancer
2. Human papillomavirus and cervical and anal cancer.
3. Epstein-Barr virus and nasopharyngeal cancer.
4. B & C
5. All of the above associations are correct.
Which one or ones of the following statements is/are correct?
1. Over 60 chemicals, including chemical mixtures and industrial processes have been classified as human carcinogens.
2. More than 300 chemicals have been identified as animal carcinogens.
3. Both
4. Neither
Which one(s) of the following statements is/are correct concerning the idea that environmental agents may be principal causes of human cancer.
1. Despite the overall incidence of cancer appears reasonably constant between countries, incidences of specific tumor types may vary up to several hundredfold.
2. Large differences in tumor incidence are noted within populations of a single country
3. Migrant populations assumed the cancer incidence of the new environment, usually within one or two generations.
4. Rapid changes in cancer rates within a population have been observed.
5. All of the above
6. None of the above
Which one(s) of the following statements is incorrect?
1. By contrast to melanoma, nonmelanoma skin cancer is not associated with cumulative lifetime UV exposure.
2. Increased skin pigmentation whether inherent or induced by tanning, is an important factor in protecting skin from carcinogenic effects of UV radiation
3. Both
4. Neither
Increased levels of DNA damage can be found in the normal epidermis of those exposed to solar UV radiation.
1. True
2. False
Substantial exposure to x-rays for diagnostic or therapeutic reasons has been associated with increased risk for which one(s) of the following cancer types?
1. Leukemia after in utero exposure
2. Breast cancer following repeated chest exposure
3. Leukemia, lung, stomach, and esophageal cancer following spinal irradiation.
4. Thyroid, skin, and neck cancer following thymus or scalp exposure.
5. All of the above
6. C only

Cancer Practice Questions

Multiple-choice exercise