Protospacer adjacent motifs, PAMs, allow bacteria to do which of the following?
A) recognize and digest foreign DNA
B) recognize proper spacing for bacterial transcription initiation
C) recognize and integrate foreign DNA
D) recognize and digest their own DNA
Answer: A
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Which of the following most adequately describes how the Alu element may have proliferated to constitute 10% of the human genome?
A. Multiple retroelements code the same gene. B. Retroelements increase with every generation. C. A single retroelement can be copied into many RNA transcripts. D. Retroelements increase with each cell division. E. Retroelements show self-proliferation.
A reason given by scientists as to why viruses are not considered living organisms is that
A. viruses can be frozen and still survive. B. viruses do not reproduce on their own. C. viruses are all smaller than the smallest known cells. D. viruses do not contain a nucleus. E. viruses do not contain genetic information.
Solenopsis invicta or red imported fire ants
(RIFAs) are extremely successful in the United States because they
a. are resistant to attacks from predators. b. are resistant to most pesticides. c. never get troubled with diseases. d. are resistant to attacks from predators and never get troubled with diseases. e. have all of these characteristics
The sympathetic division of the autonomic nervous system is responsible for the ""fight-or-flight"" response.
a. true b. false