Multiple Choice
Where in the cell does transcription occur?
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15. Gene Expression
Introduction to Transcription
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Which enzyme is primarily responsible for catalyzing the process of transcription in cells?
A
RNA polymerase
B
Helicase
C
DNA polymerase
D
Ligase
Verified step by step guidance1
Understand the process of transcription: Transcription is the process by which the genetic information in DNA is copied into messenger RNA (mRNA) for protein production.
Identify the role of enzymes in transcription: Enzymes are biological catalysts that speed up chemical reactions, including the synthesis of RNA from a DNA template.
Recognize the function of RNA polymerase: RNA polymerase is the enzyme that synthesizes RNA by reading the DNA template strand and assembling RNA nucleotides into a complementary strand.
Differentiate between the enzymes listed: Helicase unwinds the DNA double helix, DNA polymerase synthesizes DNA, and ligase joins DNA fragments. RNA polymerase is specifically responsible for RNA synthesis during transcription.
Conclude that RNA polymerase is the enzyme primarily responsible for catalyzing transcription, as it directly facilitates the formation of RNA from a DNA template.
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