Small DNA tumor viruses such as SV40 and HPV have viral oncogenes that are not homologs of host cell genes. Some of these novel viral oncogenes make proteins that exert their tumorigenic effect by
A) binding to and inactivating pRB.
B) making Gag, Pol and Env proteins more active.
C) causing cellular proto-oncogenes to mutate into oncogenes.
D) causing apoptosis in target tissues.
E) inactivating the immune system.
A
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A scientific ________ must be so thoroughly confirmed that virtually no doubt remains about its accuracy.
Fill in the blank(s) with the appropriate word(s).
Which of the following is associated with cervical cancer?
A. gonorrhea B. genital warts C. syphilis D. chancroid
The oval window is indicated by the letter ____
a. A b. B c. C d. D e. E
The rate at which mitosis occurs varies dramatically for different types of cells. The most rapid cell division occurs:
a) in the blood and the heart. b) on the skin. c) in the gametes. d) in the blood and the cells lining the various tissues of organs. e) in the liver and the brain.