Who originally discovered the process of bacterial transformation?
A. Watson and Crick
B. Chargaff
C. Griffith
D. Meselson and Stahl
E. Hershey and Chase
Answer: C
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The organism in the accompanying figure can be classified as:
a. a bird.
b. a reptile.
c. a prokaryote.
d. a protista.
e. a mammal.
You are attempting to synthesize rRNA in a test tube using DNA isolated from mouse cells. In addition to the template DNA, ribonucleotides, and the necessary transcription factors, you should also add ________ to the test tube.
A. RNA polymerase III B. poly-A polymerase C. RNA polymerase II D. RNA polymerase I
The concept of endosymbiosis is widely accepted. What kind of relationship is it?
A. Neither organism benefits. B. One organism in the partnership benefits and the other is harmed. C. One organism benefits but the other is not affected. D. Both organisms in the partnership benefit.
One mechanism by which viruses may cause cancer is to interrupt the genetic regulatory sequences of repressor proteins. Which of the following types of viruses is most likely to be involved in causing cancer by this mechanism?
A) +ssRNA viruses B) dsRNA viruses C) -ssRNA viruses D) retroviruses E) both +ssRNA and -ssRNA viruses