Multiple Choice
In a typical eukaryotic cell, where does DNA transcription primarily occur?
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5. DNA to RNA to Protein
DNA Transcription
Multiple Choice
Which option best describes how mRNA is produced in a cell during DNA transcription?
A
DNA polymerase copies the entire genome into mRNA by adding DNA nucleotides to the 3′ end of the growing strand.
B
Ribosomes read DNA directly in the nucleus and assemble mRNA from amino acids before export to the cytoplasm.
C
RNA polymerase binds a gene’s promoter, unwinds the DNA locally, and synthesizes a complementary RNA strand using one DNA strand as the template.
D
RNA polymerase joins amino acids together to form mRNA using the coding strand of DNA as the direct template.
Verified step by step guidance1
Understand that mRNA production during transcription involves synthesizing an RNA strand complementary to a DNA template strand.
Recall that the enzyme responsible for this process is RNA polymerase, not DNA polymerase or ribosomes.
Recognize that RNA polymerase binds specifically to a DNA region called the promoter, which signals the start of a gene.
Know that RNA polymerase locally unwinds the DNA double helix to access the template strand for RNA synthesis.
Remember that RNA polymerase synthesizes the RNA strand by adding RNA nucleotides complementary to the DNA template strand, extending the RNA in the 5' to 3' direction.
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