1. Cancer is often regarded as a genetic disease because: A. agents that damage
ID: 261374 • Letter: 1
Question
1. Cancer is often regarded as a genetic disease because:
A. agents that damage DNA, such as radiation, often lead to cancer.
B. some cancers run in families, suggesting heritability.
C. certain chromosomal translocations associate with specific cancers.
D. A and B.
E. All of the above.
2. Tumor cells are considered to be malignant if:
A. they divide and form a mass.
B. they invade other tissues.
C. they establish in new locations.
D. All of the above.
3. Individuals who are heterozygous for a tumor-suppressor gene:
A. are less likely to develop cancer because the mutations need to be homozygous for a tumor to form.
B. are more likely to develop cancer because only a single mutation is needed.
C. are likely to suffer multiple tumors.
D. B and C.
E. None of the above.
Explanation / Answer
1)-option b is correct because some If a parent has a gene fault when he inherit his gene to their child then their is increased risk of developing cancer.
2)-option d is correct because these cells are able to invade surroundings tissue and nearby organs.
3)-option b is correct because individual with heterozygous tumour suppressor genes at greater risk of developing cancer.
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