Site-specific recombination systems ________.
A. depend on enzymes that are often specific for sequences within the host
B. are features of some viruses
C. do not depend on extensive nucleotide sequence homology
D. All of the choices are correct.
Answer: D
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What are the units of r?
A. individuals B. individuals per unit time C. change in individuals per unit time/individuals at starting time
Individuals with Pompe disease are unable to metabolize ___________.
A. glycogen B. lactose C. insulin D. cellulose E. fats
Smallpox is a disease in which
A. recurrent episodes are called shingles. B. the virus becomes latent in ganglia of sensory neurons. C. fever, malaise, and rash occur. D. transmission occurs by direct contact with skin crusts. E. All of the choices are correct.
When bacterial viruses are grown are cultivated with a lawn culture of bacteria in a Petri dish, they form zones of clearing called:
a. phage b. plaques c. pocks d. lesions