Chapter 20: Problem 7
Restriction sites are palindromic, that is, they read the same in the \(5^{\prime}\) to \(3^{\prime}\) direction on each strand of DNA. What is the advantage of having restriction sites organized this way?
Chapter 20: Problem 7
Restriction sites are palindromic, that is, they read the same in the \(5^{\prime}\) to \(3^{\prime}\) direction on each strand of DNA. What is the advantage of having restriction sites organized this way?
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Get started for freeHow do next-generation sequencing (NGS) and third. generation sequencing (TGS) differ from Sanger sequencing?
A human cDNA clone was isolated from a cDNA library using a homologous mouse gene as a probe. The clone was grown in \(E\) coll, miniprepped to isolate the \(c D N A\), and then amplificd by \(\mathrm{PCR}\) using primers designed to the sequence of the mouse gene. When the PCR reaction was run on an agarose gel, there were multiple weak bands present instead of one clear band. What are the possible reasons for this result? How can the experiment be improved so that one clear band is amplified next time?
If you performed a PCR experiment starting with only one copy of double- stranded DNA, approximately how many DNA molecules would be present in the reaction tube after 15 cycles of amplification?
What roles do restriction enzymes, vectors, and host cells play in recombinant DNA studies? What role does DNA ligase perform in a DNA cloning experiment? How does the action of DNA ligase differ from the function of restriction enzymes?
Assume you have conducted a DNA sequencing reaction using the chain- termination (Sanger) method. You performed all the steps correctly and electrophoresced the resulting DNA fragments correctly, but when you looked at the sequencing gel, many of the bands were duplicated (in terms of length) in other lanes. What might have happened?
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