Post Test Transkripsi B

What is the first step in the process of transcription?

• Elongation of the RNA strand

• Binding of RNA polymerase to the promoter

• Cleavage of the RNA strand

• Termination of transcription

Which enzyme is responsible for synthesizing RNA during transcription?

• DNA polymerase

• RNA polymerase

• Helicase

• Ligase

Which of the following is TRUE about the mRNA molecule produced during transcription?

• It is an exact copy of the DNA sequence.

• It is complementary to the DNA template strand.

• It contains the same sequence as the DNA template strand.

• It is a double-stranded molecule.

In eukaryotic cells, where does transcription take place?

• Cytoplasm

• Mitochondria

• Nucleus

• Ribosome

What happens during the elongation phase of transcription?

• RNA polymerase detaches from the DNA.

• RNA polymerase synthesizes the RNA strand.

• The DNA template is unwound.

• The mRNA is spliced.

Which of the following signals the end of transcription in prokaryotes?

• A specific termination signal in the RNA sequence

• The binding of a release factor

• The interaction with ribosomes

• The completion of the mRNA molecule

Which of the following is an example of a cis-acting element that represses transcription in eukaryotes?

• Enhancer
  

• Promoter

• Silencer

• Terminator

Which of the following best describes a trans-acting factor?

• It is always located near the gene it regulates.
  

• It is a non-coding DNA sequence that influences transcription.

• It is a protein or RNA molecule that acts to regulate gene expression from a distant location.
  
  

• 1. It is a DNA sequence that binds to itself to regulate its own expression.

What would be the most likely result of a mutation in a cis-acting element like a promoter?

• No effect on gene expression
  
  

• Increased gene expression
  
  

• Decreased or completely blocked gene expression

• Loss of transcription factor binding

What is the function of the 5' cap and poly-A tail in eukaryotic mRNA?

• To prevent the mRNA from being degraded

• To prevent the mRNA leave the nucleus

• To disrupt the translation initiation

• To help mRNA degradation