Members of the genus Actinomyces are either straight or slightly curved rods, or slender filaments with true branching.
Answer the following statement true (T) or false (F)
True
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The active ingredient in Ecstacy is
a. MDA. b. MDMA. c. MMA. d. LSD. e. STP.
What type of experimental technique did Huberman and Riggs use to produce the first evidence of bidirectional replication in bacteria?
What will be an ideal response?
A researcher inserted DNA fragments from an organism into expression vector plasmids and introduced the modified plasmids into bacterial cells. Which of the following methods would be an effective means of identifying which clones contain a specific gene
of interest? A) Sequence the DNA of the plasmids from each isolate. B) Prepare and analyze restriction fragments of the plasmids. C) Isolate clones that still have the vector's genetic marker. D) Assay for activity of the gene product. E) Use reverse transcriptase to prepare cDNA copies.
Embryonic development begins with
A. gastrulation. B. the first cell division. C. fertilization. D. the development of the blastocyst. E. implantation.