Endonucleases and exonucleases are enzymes that can remove nucleotides from a polynucleotide chain. An endonuclease removes nucleotides _______ while an exonuclease removes nucleotides _____________.  

A.  from the 5' end of the chain; from the 3' end of the chain
B.  from the 3' end of the chain; from the 5' end of the chain
C.  internally; from the ends of the chain
D.  from the ends of the chain; internally


C.  internally; from the ends of the chain

Biology & Microbiology

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