Gene Regulation Quiz

Which of the following best describes a promoter in eukaryotic cells?

• A protein that cuts out introns from mRNA

• A DNA sequence that helps RNA polymerase recognize the start site of a gene

• A type of transcription factor that silences gene expression

• A specialized nucleotide added to the end of mRNA

The TATA box is an example of:

• A silencer sequence

• A transcription factor

• A common promoter sequence found in eukaryotes

• A type of intron

How do transcription factors allow for variety in cell types?

• By changing the DNA sequence of genes

• By binding in different combinations to regulate which genes are expressed

• By adding a tail to mRNA molecules

• By splicing exons together after transcription

Which DNA sequence increases the speed of transcription?

• Promoter

• Enhancer

• Silencer

• Intron

What is the role of silencers in gene regulation?

• They increase transcription rate

• They slow down or prevent transcription

• They cap the mRNA molecule

• They splice exons together

What helps protect mRNA from being broken down too quickly?

• Promoter

• Exon

• Cap and tail

• Silencer

Which of the following is removed from mRNA before it leaves the nucleus?

• Promoters

• Enhancers

• Exons

• Introns

The parts of an mRNA molecule that are joined together to code for proteins are called:

• Exons

• Introns

• Silencers

• Caps

Alternative splicing of mRNA allows cells to:

• Destroy faulty proteins

• Produce different proteins from the same gene

• Remove promoters from DNA

• Add extra enhancers to the gene