Multiple Choice
Which of the following is NOT true of RNA polymerase?
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10. Transcription
Overview of Transcription
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What is the primary role of RNA polymerase during transcription?
A
It translates mRNA into a polypeptide chain.
B
It synthesizes an RNA strand complementary to the DNA template strand.
C
It adds amino acids to the growing polypeptide chain.
D
It unwinds the DNA double helix and separates the two strands permanently.
Verified step by step guidance1
Understand the process of transcription, which is the first step in gene expression where a segment of DNA is copied into RNA.
Identify the role of RNA polymerase, the enzyme responsible for reading the DNA template strand during transcription.
Recognize that RNA polymerase synthesizes a strand of RNA that is complementary to the DNA template strand by matching RNA nucleotides to the DNA bases.
Note that RNA polymerase does not translate mRNA into a polypeptide chain; this is the role of the ribosome during translation.
Also understand that RNA polymerase temporarily unwinds the DNA double helix to access the template strand but does not separate the strands permanently.
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