Small circular molecules of DNA in bacteria ____.
A. are plasmids
B. are DNA fragments from their main chromosome
C. result from the activity of restriction enzymes
D. are eventually degraded
E. cannot survive outside of the cell
Answer: A
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Transcription starts at a region of DNA called a(n)
a. sequencer. b. promoter. c. activator. d. terminator. e. transcriber.
Droplets are suspensions of fine dust or moisture in the air that contain live pathogens.
a. true b. false
Within a genome, an enhancer may be located
A) upstream of the gene enhanced. B) downstream of the gene enhanced. C) within the introns of other genes. D) proximal to the gene enhanced. E) upstream or downstream of the gene enhanced, even within the introns of other genes.
Which form of communication is used by social insects to modify the behavior of the colony?
A. auditory communication B. chemical communication C. visual communication D. None of the choices are used by social insects. E. All of the choices are used by social insects.