Question

If you cut the following single stranded DNA fragment with a restriction enzyme with restriction site...

If you cut the following single stranded DNA fragment with a restriction enzyme with restriction site of 5’GAATTC 3” and the cutting point between G and A.

a. How many fragments you will get

b. Specify the size (Number of bases) and the sequence of each fragment, pay attention to DNA direction (5’-3’)
5” ACATTGTCCGGGAATTC CGGGCTAGGCAT T GAATTGGAACA GAATTC GGGCCCGATCCGTA 3
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Answer #1

Answer:

There are two restriction enzyme cut sites for the target 5' GAATTC 3', in the given DNA sequence

5” ACATTGTCCGGGAATTC CGGGCTAGGCAT T GAATTGGAACA GAATTC GGGCCCGATCCGTA 3

As a rule, if in a linear DNA there are two recognition sites for a restriction enzyme, there will be N +1 fragments.

(1) Therefore, there will be 3 DNA fragment produced

(2) The length of the DNA fragment with sequence are

(i) ACATTGTCCGGG (12 nucleotides)

(ii) AATTC CGGGCTAGGCAT T GAATTGGAACA G (30 nucleotides)

(iii) AATTC GGGCCCGATCCGTA (19 nucleotides)

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