During transcription elongation, in which direction is RNA synthesized?

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Multiple Choice

During transcription elongation, in which direction is RNA synthesized?

Explanation:
RNA is built in the 5' to 3' direction. During elongation, nucleotides are added to the 3' end of the growing RNA chain, forming a phosphodiester bond there. The DNA template is read in the opposite direction (3' to 5'), so the RNA produced is complementary to the template and grows as a new nucleotide is added to its 3' end. This combination of reading the template 3'→5' and extending the RNA 5'→3' explains why transcription elongation proceeds in the 5' to 3' direction.

RNA is built in the 5' to 3' direction. During elongation, nucleotides are added to the 3' end of the growing RNA chain, forming a phosphodiester bond there. The DNA template is read in the opposite direction (3' to 5'), so the RNA produced is complementary to the template and grows as a new nucleotide is added to its 3' end. This combination of reading the template 3'→5' and extending the RNA 5'→3' explains why transcription elongation proceeds in the 5' to 3' direction.

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