An Enzyme That Can Break a DNA Molecule at a Specific

Question

An enzyme that can break a DNA molecule at a specific point is called a
A)point mutase.
B)restriction endonuclease.
C)reverse transcriptase.
D)point depolymerase.
E)none of the above.

Accepted Answer

The enzyme that can break DNA at a specific point is called a restriction endonuclease. These enzymes recognize specific sequences of nucleotides in the DNA molecule and cleave the phosphodiester bonds within the sequence, resulting in the DNA molecule being cut at a specific site. Point mutase and point depolymerase are not valid terms for enzymes, while reverse transcriptase is an enzyme that converts RNA to DNA and is not involved in DNA cleavage.