2. Genetics
Gene Expression — Quiz
Test your understanding of gene expression with 5 practice questions.
Practice Questions
Question 1
Which of the following regulatory elements is most likely to be found far upstream or downstream from a eukaryotic gene and can significantly alter its transcription rate?
Question 2
A eukaryotic gene undergoes transcription and then its mRNA is processed. If a mutation occurs that leads to the complete loss of the poly-A tail, what is the most likely consequence for the mRNA molecule?
Question 3
During translation, a ribosome encounters the mRNA sequence $5'-UAC-3'$ at the A site. Which of the following tRNA anticodon sequences will bind to this codon, and what amino acid will be carried?
Question 4
Which of the following post-translational modifications involves the enzymatic removal of a portion of a polypeptide chain to activate a protein, such as in the maturation of insulin?
Question 5
In a eukaryotic cell, if a gene's promoter region undergoes extensive methylation, what is the most likely effect on the expression of that gene?