During a DNA profiling analysis, short tandem repeats are first ____
a. subjected to high heat
b. inserted into a plasmid
c. chopped up using a restriction enzyme
d. placed on a gel for electrophoresis
e. amplified using PCR
ANSWER: e
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Larval salamanders eat small insects and crustaceans. These insects and crustaceans are
herbivores. Thus, the salamanders belong to the __________ trophic level.
a. first b. second c. third d. fourth
When is cell-to-cell communication particularly important in regulating gene expression?
A) During mitosis B) During meiosis C) During embryonic development D) During replication
"Boy! You can line up all these homologous pairs of chromosomes in a lot of different ways!" This process is referred to as
A. segregation. B. synapse. C. independent assortment. D. crossing-over.
The control section containing Coccidioides immitis shows very pale pink-stained organisms on the PAS stain. This is most likely the result of:
a) prolonged time in the Schiff reagent b) inadequate time in the sulfurous rinse solution c) too long in the running tap water d) old or overused reagents