The first documentation of a viral infection causing oncogenesis was established with
A) Rous sarcoma virus in chickens.
B) Epstein-Barr virus in Burkitt's lymphoma.
C) hepatitis B in liver cancer.
D) HIV in humans.
E) human papilloma virus in cervical cancer.
A) Rous sarcoma virus in chickens.
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Bioluminescence occurs as a result of
a. luminescent organs. b. symbiotic bacteria. c. conversion of protein luciferin into light energy d. both a and b e. both b and c
____ occurs when a change in chromosome number takes place in a single generation
a. Sympatric speciation b. Disruptive selection c. Directional selection d. Hybrid sterility
e. Allopatric speciationWhich of the following antibiotics specifically inhibits DNA synthesis?
A. Quinolones B. Tetracycline C. Polymyxin B D. Gentamycin
Which of the following statements about secretion is true?
(a) The membrane of a secretory vesicle will fuse with the plasma membrane when it discharges its contents to the cell's exterior. (b) Vesicles for regulated exocytosis will not bud off the trans Golgi network until the appropriate signal has been received bythe cell. (c) The signal sequences of proteins destined for constitutive exocytosis ensure their packaging into the correct vesicles. (d) Proteins destined for constitutive exocytosis aggregate as a result of the acidic pH of the trans Golgi network.