Genetic Analysis: An Integrated Approach (2nd Edition)
Genetic Analysis: An Integrated Approach (2nd Edition)
2nd Edition
ISBN: 9780321948908
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 10, Problem 20P

Restriction enzymes recognize specific double - stranded DNA sequences that have the same sequence on both strands. For example, the restriction sequence for BamHI is 5'-GGATCC-3' on each DNA strand and for SmaI is 5'-CCCGGG-3' on each strand. A single phosphodiester bond on each strand is cut at the same place in the sequence on each strand. Explain how restriction enzymes are able to recognize the same sequence and cut the sequence in the same place on each DNA strand.

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Restriction sites are palindromic; that is, they read the same in the5' to 3' direction on each strand of DNA. What is the advantage ofhaving restriction sites organized this way?
When circular DNA is sequenced, the nucleotide base pairs are numbered starting from a fixed position on the DNA, all the way around, usually in a clockwise manner. a DNA molecule that is 3133 base pairs long is digested with RsaI restriction enzyme recognition sites at base numbers 366, 1534, and 2207. What are the sizes of the DNA fragments that will be produced after the DNA is digested with RsaI?
The partial sequence of one strand of a double-stranded DNA molecule is 5'-GACGAAGTGCTGCAGAAAGTCCGCGTTATAGGCATGAATTCCTGAGG -3' EcoRI is a restriction enzyme that cleaves after G in the sequence 5'-GAATTC-3'. PstI is a restriction enzyme that cleaves after A in the sequence 5'-CTGCAG-3'. Write the sequence of both strands of the DNA fragment created when this DNA is cleaved with both EcoRI and PstI. The first strand of your duplex DNA fragment should be derived from the given strand sequence. 5'- -3' 3'- -5'
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