4th November 2019


What is a codon and what does it do?

A codon is the sequence of 3 consecutive nucleotides on a DNA or RNA strand. It either codes for a specific amino acid in a polypeptide or terminates the polypeptide chain ( then called as termination codon).

In this manner, what is the role of a codon?

mRNA (messenger RNA): contains codons that code for the peptide sequence. tRNA (transfer RNA): contains the anticodon on the "tip" and the corresponding amino acid on the "tail". Link the correct amino acid to its corresponding mRNA codon through codon-anticodon interaction. rRNA (ribosomal RNA): forms the ribosome.

What is a codon and what is its purpose?

codon. A sequence of three adjacent nucleotides constituting the genetic code that specifies the insertion of an amino acid in a specific structural position in a polypeptide chain during the synthesis of proteins.

What is the function of the start and stop codons?

The start codon marks the site at which translation into protein sequence begins, and the stop codon marks the site at which translation ends. How do we know which codon codes for which amino acid? Use a Genetic Code table, as in the next slide.
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