Primer (molecular biology)

The DNA replication fork. RNA primer labeled at top.

Diagrammatic representation of the forward and reverse primers for a standard PCR

A primer is a strand of short nucleic acid sequences (generally about 10 base pairs) that serves as a starting point for DNA synthesis. It is required for DNA replication because the enzymes that catalyze this process, DNA polymerases, can only add new nucleotides to an existing strand of DNA. The polymerase starts replication at the 3'-end of the primer, and copies the opposite strand.

单词	Universal primer
释义	Universal primer 原声例句双语版 TED-Ed 演讲精选 Scientists then apply the polymerase chain reaction or PCR, which uses artificial DNA strands called universal primers. 接着科学家们应用聚合酶链式反应，简称 PCR，使用一种被称为通用引物的人工合成 DNA 链。英语百科 Primer (molecular biology) A primer is a strand of short nucleic acid sequences (generally about 10 base pairs) that serves as a starting point for DNA synthesis. It is required for DNA replication because the enzymes that catalyze this process, DNA polymerases, can only add new nucleotides to an existing strand of DNA. The polymerase starts replication at the 3'-end of the primer, and copies the opposite strand.
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Universal primer

Primer (molecular biology)