In recombinant DNA techniques, the gaps in the paired DNA fragments are closed by ____
a. restriction enzymes
b. DNA ligase
c. DNA polymerase
d. DNA replicase
e. reverse transcriptase
b
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A ________ mutation is one that causes premature termination of the synthesis of the protein product.
A. nonsense B. silent C. missense D. None of the choices are correct.
Horizontal DNA transfer may make it more difficult to construct phylogenetic trees
Indicate whether this statement is true or false.
What would happen if snRNAs did not recognize the branch point within an intron?
A. A 3' poly A tail would not be added to the transcript. B. A lariat would not form. C. snRNAs would not base pair with the 5' end of the intron. D. A 5' cap would not be added to the transcript.
Neisseria meningitidis, which causes meningococcal meningitis, is capable of triggering sporadic disease outbreaks by which of the following methods?
A) hides from the immune system inside neurons B) mutations due to utilization of reverse transcriptase C) infecting compromised hosts D) capsular switching E) efficient spreading in the host by breaking down blood clots