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Q.

Select the incorrect statement.

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a

Upto 900 restriction enzymes have been isolated from over 230 strains of bacteria.

b

In the year 1963, the two enzymes responsible for restricting the growth of bacteriophage in Escherichia coli were isolated.

c

Polymerase enzyme is one of the key tools for recombinant DNA technology.

d

EcoRI cut the DNA between bases G and A producing blunt ends, when the sequence GAATTC is present in the DNA.

answer is D.

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Detailed Solution

EcoRI identifies specific palindromic DNA sequence GAATTC and cuts are specific locations away from the center between G and A making staggered or sticky end cuts. It breaks phosphodiester bonds and hydrogen bonds.

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Select the incorrect statement.