Textbook Question
Each of the following statements about protein synthesis is false. Correct each to make a true statement.
The enzyme RNA polymerase builds a strand of transfer RNA, whose codons are complementary to DNA's triplets.
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3. Energy & Cell Processes
Steps of Transcription
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During transcription of DNA to RNA:
A
The RNA polymerase moves along the DNA in the 5' to the 3' direction.
B
The 3' end of the RNA molecule is produced first.
C
The RNA polymerase must first bind to a promoter sequence.
D
Transcription is always initiated at a "start codon".
Verified step by step guidance1
Understand that transcription is the process of copying a segment of DNA into RNA, specifically mRNA, by the enzyme RNA polymerase.
Recognize that RNA polymerase binds to a specific region of the DNA called the promoter sequence, which is essential for initiating transcription.
Note that the RNA polymerase moves along the DNA template strand in the 3' to 5' direction, synthesizing the RNA strand in the 5' to 3' direction.
Clarify that the 5' to 3' direction refers to the orientation of the RNA strand being synthesized, not the movement of the polymerase along the DNA.
Understand that transcription does not start at a 'start codon'; instead, it begins at the promoter region, and the start codon is relevant during translation, not transcription.
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