Question

In human beings, retrovirus is considered as a cause of cancer because

• A. In their genome, gene is present
• B. Their hereditary material made up of single stranded RNA
• C. They have a gene for reverse transcriptase
• D. In their genome, there may be cellular proto-oncogene

Answer 1

The correct option is D In their genome, there may be cellular proto-oncogene

Cancer is caused by an oncogenic virus called the oncovirus that is acutely transforming of the retrovirus. This is also called the oncornavirus as they denote the origin of an RNA virus. This is now denoted as the DNA or RNA genome that is causing cancer. Often called the cancer virus or the tumor virus. So, the correct answer is option D.