Question

a mutation causes a sequence of dna that has the nucleotides ttg to be changed to tcg. the resulting protein has a different sequence of amino acids. which type of mutation is this?
○ missense
○ nonsense
○ silent
○ frameshift

Explanation:

• A missense mutation changes one DNA nucleotide, leading to a different amino acid in the protein.
• A nonsense mutation creates a premature stop codon, truncating the protein.
• A silent mutation changes a nucleotide but does not alter the encoded amino acid.
• A frameshift mutation involves insertion/deletion of nucleotides, shifting the reading frame.

Here, a single nucleotide change (TTG → TCG) results in a different amino acid sequence, matching missense mutation characteristics.

Answer:

missense