Gene Transcription and DNA Function Quiz

What is the role of the promoter in a gene?

• It stops transcription.

• It is where RNA polymerase binds to initiate transcription.

• It codes for proteins.

• It prevents chromosomal deterioration.

Which of the following is a function of non-coding DNA?

• Codes for polypeptides.

• Initiates transcription.

• Prevents chromosomal deterioration.

• Translates RNA into proteins.

What is the function of the terminator sequence in a gene?

• It initiates transcription.

• It codes for proteins.

• It stops transcription by RNA polymerase.

• It binds RNA polymerase.

What is the role of free RNA nucleotides during transcription?

• They bind to the promoter.

• They align with their complementary base partners.

• They prevent transcription.

• They code for proteins.

Where does transcription occur within a cell?

• In the cytoplasm.

• In the nucleus.

• In the ribosome.

• In the mitochondria.

In which direction is DNA transcribed?

• 3’ → 5’

• 5’ → 3’

• 2’ → 4’

• 4’ → 2’

What is the role of activator proteins in gene expression?

• Bind to silencer sites and impede promoter binding

• Bind to enhancer sites and mediate promoter binding

• Bind to promoter sites and inhibit transcription

• Bind to exon sites and enhance translation

What is added to the 3’-end of a transcript during RNA processing?

• Methyl group

• Poly-A tail

• Phosphate group

• Ribose sugar

What are non-coding sequences within a gene called?

• Exons

• Codons

• Introns

• Anticodons

What is the process called when exons are selectively removed to form different polypeptides?

• Transcription

• Translation

• Alternative splicing

• Replication