Multiple Choice
Where is the promoter sequence TATAAT, also known as the TATA box, typically located in relation to the transcription start site in prokaryotic cells?
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15. Gene Expression
Introduction to Transcription
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Which of the following is the enzyme complex that catalyzes transcription in bacterial cells?
A
Helicase
B
RNA polymerase
C
DNA polymerase
D
Ribosome
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 responsible for reading the DNA template and synthesizing the complementary RNA strand during transcription.
Differentiate between the given options: Helicase unwinds DNA strands, DNA polymerase synthesizes DNA, and ribosomes are involved in protein synthesis, not transcription.
Conclude that RNA polymerase is the enzyme complex that catalyzes transcription in bacterial cells, as it directly facilitates the synthesis of RNA from a DNA template.
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