The restriction enzyme EcoRI recognizes the sequence G↓AATTC.Which of the following is TRUE of DNA after it is treated with EcoRI?
A)All of the DNA fragments will have single-stranded regions ending in AA.
B)All of the DNA fragments will have single-stranded regions ending in G.
C)Some of the DNA will have single-stranded regions ending in AA and others will end in G.
D)All of the DNA will have blunt ends.
E)All of the DNA will be circular.

Question

Quizplus · Accepted Answer

EcoRI cuts the DNA sequence G↓AATTC between G and A, resulting in DNA fragments with single-stranded overhangs (sticky ends) that end in AA.

The Restriction Enzyme EcoRI Recognizes the Sequence G↓AATTC