In Griffith's experiment _____.
a. heat-killed S strain bacteria killed the mice
b. R strain bacteria killed the mice
c. a mixture of heat-killed S strain bacteria and R strain bacteria failed to kill the mice
d. S strain bacteria killed the mice
Ans: d. S strain bacteria killed the mice
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The observation that most pureblood Native Americans have type O blood is best explained by _____
A. gene flow. B. assortative mating. C. genetic drift. D. a founder effect. E. frequent mutations.
If a specimen contains 30% adenine in its DNA, how much cytosine will it contain?
A. 40% B. 30% C. 20% D. 10% E. 15%
An infectious disease with occasional new cases reported in random locales at irregular intervals is said to be ____
a. sporadic b. endemic c. pandemic d. epidemic
What structure is responsible for selecting and transporting only properly processed eukaryotic mRNAs into the cytoplasm?
A. ribosomes B. spliceosome C. snRNPs D. nuclear pore complex E. RNA polymerase