CRISPR sequences occur naturally as
A) an antiviral immune system in bacteria.
B) an antibacterial immune system in eukaryotes.
C) an antiviral immune system in eukaryotes.
D) a gene editing system in bacteria.
A) an antiviral immune system in bacteria.
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The thermostable enzyme most commonly used in PCR is reverse transcriptase.
Answer the following statement true (T) or false (F)
Standard microbiological practices include all of the following EXCEPT
A. work space should be disinfected only when contaminating spills occur. B. eating, drinking, manipulation of contact lenses, and the use of cosmetics, gum, and tobacco products are strictly prohibited in the lab. C. hair longer than shoulder length should be tied back. D. lab personnel should know how to use the emergency eyewash and shower stations.
Which ponds contained only killifish as predators?
a. primero and quinto b. segundo, tercero, and sexto c. tercero and quinto d. quarto, sexto, and septimo e. none of the above (all ponds containing killifish also contained cichlids)
Traits that are controlled by several sets or pairs of alleles, such as skin color and height in humans, are the result of what form of inheritance?
A. codominance B. polygenic C. incomplete dominance D. simple Mendelian inheritance E. multiple allele systems