Achange in the natural sequence of bases in dna structure is called a a) mutation. b) reconstruction. c) revolution. d) translation.

The correct answer is option A

Any permanent change in the DNA sequence which is caused due to the alteration in the DNA during the process of replication or induced due to environmental factors is called as mutation. It can be useful or harmful.

It can be natural or induced. There are various external factors by which mutation can be induced in the DNA by the exposure of several factors such as smoking, radiation and sunlight.