Question

Mutation that results in a new triplet code for a different amino acid, is called?

1) missense mutation
2) Nonsense mutation
3) Silent mutation
4) Natural mutation
5) All of the above

Answer 1

A mutation that results in a new triplet code for a different amino acid is called a missense mutation, which is option 1) missense mutation.

Step-by-step explanation:

A mutation that results in a new triplet code for a different amino acid is called a missense mutation. If a missense mutation replaces an amino acid with significantly different properties, it may lead to diseases such as sickle cell disease, which is caused by a point mutation that changes glutamic acid to valine in the hemoglobin gene.

However, if the new amino acid is chemically similar to the original one, the protein's function may not significantly change. Point mutations can also result in nonsense mutations, where an amino acid codon is changed to a stop codon, leading to premature protein termination, or silent mutations, which do not alter the amino acid sequence of a protein. The correct option for the student's question is 1) missense mutation.