Question

of mrna. the completed portion of mrna detaches from the dna template strand as more rna nucleotides are added. behind the transcription bubble, hydrogen bonds reform between the unzipped strands of dna.
elongation continues until rna
polymerase reaches a dna sequence
called the terminator, which signals the
end of the gene. during termination, rna
polymerase and the new mrna strand
fully detach from the dna. the new
mrna strand is then modified to prepare
it for building proteins and to protect it
on its journey out of the nucleus.
match each stage of transcription to its description.
initiation termination elongation
rna polymerase moves down the dna and pairs rna
nucleotides along the template strand.
rna polymerase reaches a terminator, where the new
mrna strand detaches from the dna.
rna polymerase binds to a promoter and unzips a section
of dna.

Explanation:

1. For the description "RNA polymerase moves down the DNA and pairs RNA nucleotides along the template strand" - this is elongation as it's the stage where the RNA strand is being built (elongated) by adding nucleotides.
2. For "RNA polymerase reaches a terminator, where the new mRNA strand detaches from the DNA" - this is termination as it signals the end of transcription and detachment.
3. For "RNA polymerase binds to a promoter and unzips a section of DNA" - this is initiation as it's the start of transcription where RNA polymerase binds to start the process.

Answer:

• "RNA polymerase moves down the DNA and pairs RNA nucleotides along the template strand" → elongation
• "RNA polymerase reaches a terminator, where the new mRNA strand detaches from the DNA" → termination
• "RNA polymerase binds to a promoter and unzips a section of DNA" → initiation