Question

gene expression and gene regulation quick check
what would happen if a cell transcribed and translated a genes intron by mistake? (1 point)
the intron would begin to duplicate itself.
additional amino acids would be inserted into the chain.
errors in the protein folding would be repaired.
the dna would remain the same as before.

Explanation:

Introns are non - coding regions of a gene. During normal gene expression (transcription and translation), introns are removed from the pre - mRNA (by splicing). If an intron is transcribed and translated by mistake:

• The intron itself does not duplicate. So, the first option is wrong.
• Since introns are not part of the normal coding sequence for the protein, when translated, they will add extra amino acids (because the intron's nucleotide sequence will be read as codons during translation).
• There is no mechanism for the cell to'repair' protein folding errors caused by incorrect translation of an intron in this context. So, the third option is wrong.
• While the DNA sequence of the gene (the original template) may remain the same, the question is about the consequence of transcribing and translating the intron. The fourth option is not relevant to the immediate effect of incorrect transcription/translation of the intron.

Answer:

Additional amino acids would be inserted into the chain.