A ________ assay is most useful for determining the viability of a viral preparation.

A. PCR
B. plaque
C. hemagglutination
D. direct (electron microscopic) count


Answer: B

Biology & Microbiology

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If short hair (L) is dominant to long hair (l), then

what fraction of the offspring produced by a cross of Ll x ll will be homozygous dominant? a. 1/2 b. 1/4 c. 1/3 d. none (no chance of this offspring) e. none of these answers is correct

Biology & Microbiology

Before clotting factors from recombinant DNA became available, more than half of hemophiliacs in the U.S. acquired

HIV from injection of clotting factors obtained from donated blood. a. True b. False

Biology & Microbiology

The regulation of eukaryotic gene expression is ________, allowing a relatively small number of different DNA control elements and transcription

factors to establish highly specific and precisely controlled patterns of gene expression by acting in different combinations in different cell types. Fill in the blank with correct word.

Biology & Microbiology

Reproductive success of an individual is known as:

A. microevolution. B. macroevolution. C. adaptive makeup. D. variation. E. fitness.

Biology & Microbiology