Multiple Choice
Which of the following correctly describes events that occur during transcription?
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15. Gene Expression
Introduction to Transcription
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Which of the following occurs during transcription in protein synthesis?
A
Ribosomes assemble amino acids into a polypeptide chain
B
DNA helicase unwinds the DNA double helix
C
tRNA molecules bring amino acids to the ribosome
D
RNA polymerase synthesizes mRNA from a DNA template
Verified step by step guidance1
Understand that transcription is the process of synthesizing RNA from a DNA template. This is the first step in protein synthesis.
Identify the key enzyme involved in transcription: RNA polymerase. This enzyme is responsible for reading the DNA template and synthesizing a complementary RNA strand.
Recognize that during transcription, RNA polymerase binds to a specific region on the DNA called the promoter, initiating the synthesis of mRNA.
Note that as RNA polymerase moves along the DNA, it unwinds the DNA helix and adds RNA nucleotides complementary to the DNA template strand, forming a single-stranded mRNA molecule.
Conclude that the correct answer to the problem is that RNA polymerase synthesizes mRNA from a DNA template, as this is the primary event occurring during transcription in protein synthesis.
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