When interferon attaches to a cell, a _______.
A. virus can enter the cell but cannot replicate
B. viral replication takes place as usual
C. virus can replicate within a cell but cannot be released
D. virus cannot enter the cell
A. virus can enter the cell but cannot replicate
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A couple has a baby that is monosomic for the X chromosome. This most likely occurred during meiosis because:
A. there was nondisjunction of the sister chromatids. B. there was an inversion in the X chromosome and crossover occurred. C. there was a duplication in the X chromosome and crossover occurred. D. there was translocation of another chromosome onto the X chromosome. E. either there was an inversion in the X chromosome or there was a duplication in the X chromosome and crossover occurred.
What is the average annual rainfall in the desert biome?
a. over 250 cm b. 80 – 90 cm c. less than 25 cm d. 40-80 cm e. 100-150 cm
Which antibody is most commonly associated with
an allergic reaction? a. IgG b. IgA c. IgD d. IgM e. IgE
What is the likelihood that a patient infected by West Nile virus will develop West Nile encephalitis?
A. Greater than 20% B. Between 1% and 10% C. Greater than 50% D. Between 10% and 15% E. Less than 1%