Human Health and Diseases Question 113
113. Retroviruses are implicated as a cause for cancer in humans because they
(a) carry gene for reverse transcriptase
(b) may carry cellular proto-oncogenes in their genome
(c) may carry v-oncogenes in their genome
(d) carry single stranded RNA as their genetic material
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Answer : b
Hints & Solutions
(b) Cancer is initiated when the inactive protooncogenes are activated to cellular oncogenes which trigger uncontrolled cell multiplication.