Question

reviewing dna mutations
identify the types of point mutations depicted.
glycine
glycine
missense mutation
nonsense mutation
silent mutation
done
lysine
stop
missense mutation
nonsense mutation
silent mutation
done

Explanation:

• Left Mutation:
• A point mutation occurs when a single nucleotide is changed. In the left - hand side, the original codon (for Glycine) has a change in the third nucleotide (\(C\) to \(A\)).
• Since the amino acid (Glycine) does not change, this is a silent mutation. A silent mutation is a type of point mutation where the nucleotide change does not result in a change in the amino acid sequence of the protein due to the degeneracy of the genetic code.
• Right Mutation:
• In the right - hand side, the original codon (\(AAG\) which codes for Lysine) has a change in the first nucleotide (\(A\) to \(T\)).
• The new codon (\(TAG\)) is a stop codon. A nonsense mutation is a point mutation that changes an amino - acid - coding codon into a stop codon, prematurely terminating protein synthesis.

Answer:

Left Mutation: silent mutation; Right Mutation: nonsense mutation