Hookworms and threadworms usually enter the body by penetrating into the skin.
Answer the following statement true (T) or false (F)
True
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You have isolated a newly discovered virus and are attempting to characterize it. You begin with its genome. You first isolate the virion-producing mRNA from cultured cells infected with the virus
When you compare these mRNA to the viral genome, you find that they are complementary. What does this tell you? A) This virus has a positive-sense genome. B) This virus has a negative-sense genome. C) This virus has an ambisense genome. D) The virus does not use DNA or RNA.
A transposable element composed of an antibiotic resistance gene, a recombinase gene, and inverted repeats is identified in a bacterial genome. This element can be any of the following except
A. an integrated conjugative element. B. a composite transposon. C. an insertion sequence. D. a unit transposon.
Referring to the illustration, what activates the cyclin/Cdk complex?
a. binding between them
b. target protein
c. kinase
d. cyclin/Cdk is not activated
Potassium-40 is useful in determining the age of a fossil
A. in samples less than 25,000 years of age. B. in samples of 40,000 to 50,000 years of age. C. in samples 300,000 years of age and older. D. in samples aged between 50,000 and 100,000 years of age. E. in samples aged between 100,000 years and 250,000 years.