Cancer causing viruses often contain:
(I)oncogenes.
(II)genes encoding variant proteins.
(III)genes encoding cell proliferation inhibitors.
(IV)genes capable of inducing malignant transformation.
A)I only
B)III only
C)IV only
D)I,II,IV
E)I,II,III,IV

Question

Quizplus · Accepted Answer

Cancer causing viruses often contain oncogenes which promote cell proliferation and cell cycle progression, they may also contain genes encoding variant proteins that interfere with normal cell signaling pathways. These variants can either block normal activities of cellular proteins or mimic activities of proteins involved in cell proliferation. Additionally, these viruses contain genes that are capable of inducing malignant transformation of the host cell. They do not typically contain genes encoding cell proliferation inhibitors. Therefore, options I, II, and IV would be correct.

Cancer Causing Viruses Often Contain