Why does proteolysis of the gag-pol fusion protein only occur AFTER release of the virion from the infected cell? A) to prevent degradation of the genome by RNAse H B) to prevent reinfection of the already infected cell C) to prevent viral particles from binding to each other inside the cell How do oncornaviruses cause cancer? A) they express an oncogene at high levels and inappropriate times OB) they express proteins that bind to p53 and Rb, thus inactivating them OC) they express tumor suppressor genes at high levels and inappropriate times

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Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.