In automated DNA sequencing, eventually
there will be millions of DNA fragments all
tagged at
a. one end.
b. both ends.
c. every nucleotide.
d. the most numerous nucleotide.
e. the least numerous nucleotide
A
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A restriction enzyme is a ____
a. viral enzyme that randomly cuts DNA b. DNA ligase enhancer c. bacterial enzyme that cuts DNA at specific sites d. single-stranded RNA molecule e. bacterial enzyme that functions in DNA replication
A vector is an organism that carries
A. mutations. B. toxins. C. spores. D. parasites.
A student has their teeth cleaned. The hygienist nicks their gum tissue. The student develops endocarditis due to Streptococcus. What kind of pattern of infection is this?
A. mixed infection B. focal C. localized D. systemic E. All of these choices are correct.
Choose all the characteristics that are true about "active immunity."
> It protects the body against a new infection thanks to antibodies developed by the host during the first exposure to the antigen. > It requires several days to develop. > It can last for a relatively long time, sometimes for life. > Active immunity can be stimulated only by artificial means. It protects the body against a new infection thanks to antibodies developed by the host during the first exposure to the antigen. It requires several days to develop. It can last for a relatively long time, sometimes for life.