Transcription Mechanism

What is the first step in transcription?

• Synthesis of RNA from the DNA template

• Unwinding of the DNA double helix

• Binding of transcription factors to the promoter region

• Formation of RNA polymerase complex

Which enzyme is responsible for transcription?

• RNA polymerase

• DNA polymerase

• Lipase

• Amylase

What is the function of RNA polymerase in transcription?

• RNA polymerase synthesizes RNA from a DNA template during transcription.

• RNA polymerase repairs DNA during transcription.

• RNA polymerase breaks down RNA during transcription.

• RNA polymerase copies DNA during transcription.

What is the role of the promoter in transcription?

• Terminate transcription

• Enhance translation

• Initiate and regulate transcription

• Repair DNA damage

What happens during the initiation phase of transcription?

• RNA polymerase binds to the promoter region and unwinds the DNA double helix.

• RNA polymerase binds to the operator region and unwinds the DNA double helix.

• RNA polymerase binds to the enhancer region and unwinds the DNA double helix.

• RNA polymerase binds to the terminator region and unwinds the DNA double helix.

What is the purpose of elongation in transcription?

• To synthesize an RNA molecule using the DNA template strand as a guide.

• To produce a protein molecule

• To repair damaged DNA

• To create a complementary DNA strand

What is the final step in transcription?

• initiation

• termination

• elongation

• splicing

How does RNA polymerase recognize the promoter sequence?

• RNA polymerase recognizes the promoter sequence through the initiation codon.

• RNA polymerase recognizes the promoter sequence through the stop codon.

• RNA polymerase recognizes the promoter sequence through the TATA box and the binding of transcription factors.

• RNA polymerase recognizes the promoter sequence through the ribosome binding site.

What is the role of termination in transcription?

• Termination in transcription marks the end of the process and allows for the release of the newly synthesized RNA molecule.

• Termination in transcription is responsible for initiating the process of transcription.

• Termination in transcription helps in the repair of damaged DNA strands.

• Termination in transcription is involved in the regulation of gene expression.

What are the three stages of transcription?

• initiation, elongation, and termination

• exonuclease, endonuclease, and ligase

• promoter, operator, and enhancer

• replication, translation, and recombination