Question

An important feature of restriction enzymes is that each enzyme only recognizes a specific palindrome and cuts the DNA only at that specific sequence of bases. A palindromic sequence can be repeated a number of times on a strand of DNA, and the specific restriction enzyme will cut all those palindromes, no matter what species the DNA is coming from. 1. If the GAATTC palindrome is repeated four times on the same piece of linear DNA, and the restriction enzyme recognized that base sequence is present and digests the DNA, how many DNA fragments will be produced? 2. If the GAATTC palindrome repeats are randomly found along the DNA strand, then what can you say about the sizes of the fragments that will be produced when the DNA is digested with a restriction enzyme that recognized that sequence?

          An important feature of restriction enzymes is that each enzyme only recognizes a
specific palindrome and cuts the DNA only at that specific sequence of bases. A
palindromic sequence can be repeated a number of times on a strand of DNA, and the
specific restriction enzyme will cut all those palindromes, no matter what species the
DNA is coming from.
1. If the GAATTC palindrome is repeated four times on the same piece of linear
DNA, and the restriction enzyme recognized that base sequence is present and
digests the DNA, how many DNA fragments will be produced?
2. If the GAATTC palindrome repeats are randomly found along the DNA strand,
then what can you say about the sizes of the fragments that will be produced
when the DNA is digested with a restriction enzyme that recognized that
sequence?

An important feature of restriction enzymes is that each enzyme only recognizes a
specific palindrome and cuts the DNA only at that specific sequence of bases. A
palindromic sequence can be repeated a number of times on a strand of DNA, and the
specific restriction enzyme will cut all those palindromes, no matter what species the
DNA is coming from.
1. If the GAATTC palindrome is repeated four times on the same piece of linear
DNA, and the restriction enzyme recognized that base sequence is present and
digests the DNA, how many DNA fragments will be produced?
2. If the GAATTC palindrome repeats are randomly found along the DNA strand,
then what can you say about the sizes of the fragments that will be produced
when the DNA is digested with a restriction enzyme that recognized that
sequence?

Added by Cynthia Y.

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