RNA primers required for polymerase to continue synthesis must be present on which strand during DNA synthesis?
1. Neither strand
2. Only the leading strand
3. Both leading and lagging strands
4. Only the lagging strand

Respuesta :

RNA primers required for polymerase to continue synthesis must be present on both leading and lagging strands during DNA synthesis.

RNA Primer is RNA that initiates DNA synthesis. These primers are required for DNA synthesis because DNA polymerase is unable to initiate polynucleotide. Polymerase require a template and RNA primer to synthesize DNA in the 5 prime to 3 prime direction (5'-3'). One RNA primer is only required on the leading strand, because DNA is produced continuously on leading strand. Whereas DNA is synthesize in small lengths on the lagging strand, therefore more than one RNA Primer is required on lagging strand.

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