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Handout
BiologyWise

Biology Wise: What Is a Stop Codon?

For Students 9th - 10th
A stop codon is a nucleotide triplet in messenger RNA that signals the end of a protein during the translation process. Read about how this works, the different types of stop codons, and how a mutation can sometimes occur.
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Handout
BiologyWise

Biology Wise: Start Codon

For Students 9th - 10th
A start codon is a nucleotide triplet in a genetic sequence that occurs at the start of a protein's synthesis. Read about how this works and how a mutation can sometimes occur.