in-rna-polymerase-directed-transcription-during-elongation-aspartyl-residues-asp

Question

In RNA polymerase-directed transcription, during elongation, aspartyl residues (asp)along with Mg²⁺ ions coordinate the phosphates of the ribonucleotides. The overall reaction is (NMP)n +NTP → (NMP)n+1 +PPi. Which of the following is correct about the first and second Mg²⁺ ions?

Accepted Answer

The first Mg²⁺ ion bonds with α-phosphate of NTP whereas the second Mg²⁺ bonds with pyrophosphate of NTP.

Answer

The first Mg²⁺ ion bonds with the pyrophosphate of NTP whereas the second Mg²⁺ bonds with the α-phosphate of NTP.

Answer

Mg²⁺ ions aren't involved in the elongation process.

Answer

None of these.

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