Enzymes that catalyze stepwise hydrolysis of mononucleotides from one end of a polynucleotide chain are
A) polymerases.
B) endonucleases.
C) ligases.
D) exonucleases.
E) nickases.

Question

Quizplus · Accepted Answer

Exonucleases are enzymes that catalyze the stepwise hydrolysis of mononucleotides from one end of a polynucleotide chain. They can cleave off nucleotides from the 3' or 5' end, depending on their specificity. Examples include exonuclease I, exonuclease III, and T7 exonuclease.

Enzymes That Catalyze Stepwise Hydrolysis of Mononucleotides from One End