Question

A DNA or RNA primer: Group of answer choices marks the start of translation. is needed...

A DNA or RNA primer:

Group of answer choices

marks the start of translation.

is needed for both DNA and RNA synthesis.

is always at the 5' end of a polynucleotide product.

marks the start of transcription.

is always at the 3' end of polynucleotide product.

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Answer #1

A DNA or RNA primer

Ans :

Is always at the 5' end of a polynucleotide product.

Replication of DNA requires a RNA primer for its initiation. DNA Polymerase is such an enzyme that can't directly add DNA nucleotides on the template strand rather it can add nucleotides on the 3' end of a RNA primer. Transcription or synthesis of RNA does not require any primer. As the DNA elongates by addition of Nucleotides on the 3' end of RNA primer, it is always at the 5' end of a polynucleotide product.

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