THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Primer is a short DNA strand synthesised by Primase
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Primer is a short RNA strand synthesised by Primase
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Primer is a short DNA strand synthesised by Helicase
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Primer is a short RNA strand synthesised by Helicase
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Detailed explanation-1: -Primase is the ssDNA-dependent RNA polymerase that synthesizes RNA primers during DNA replication. In common with all DNA and RNA polymerases, primase has structural and functional features involved in polymer elongation.
Detailed explanation-2: -A primer is a short nucleic acid sequence that provides a starting point for DNA synthesis. In living organisms, primers are short strands of RNA. A primer must be synthesized by an enzyme called primase, which is a type of RNA polymerase, before DNA replication can occur.
Detailed explanation-3: -DNA primases are enzymes whose continual activity is required at the DNA replication fork. They catalyze the synthesis of short RNA molecules used as primers for DNA polymerases. Primers are synthesized from ribonucleoside triphosphates and are four to fifteen nucleotides long.
Detailed explanation-4: -The problem is solved with the help of an enzyme called primase. Primase makes an RNA primer, or short stretch of nucleic acid complementary to the template, that provides a 3’ end for DNA polymerase to work on.