Biology · Principles and Processes in Biotechnology

Exonucleases and Endonucleases are two classes of nucleases that differ in their mode of action. Which of the following accurately describes the function of exonucleases?

1. They remove nucleotides from the ends of the DNA strand.
2. They make internal cuts at specific palindromic positions within DNA.
3. They join Okazaki fragments during DNA replication.
4. They synthesize complementary DNA strands using an RNA template.