00:01
Hello, so let's answer now the problem.
00:02
So we are asked which of the following here is the reason why there is mutation in the dna nucleotides.
00:20
So again, the mutation or the change happens in the sequence of the dna nucleotides.
00:29
So first, the answer why there is mutation.
00:38
In dna nucleotide is we have some mutations.
00:46
Some mutations are based on changes in the nucleotide structure.
01:08
And this can be reversible, which can be either reversible or not reversible.
01:34
So this is the first reason.
01:36
Next reason is mutations can occur.
01:43
Mutations can occur in the presence of external mutagens external mutagens including uv or ultraviolet rays uv or ultraviolet rays you have tanning also we have smoking and or carcinogenic or carcinogens in our food and water okay, so this is one of the answer.
03:01
And the last answer here is mutations can occur based on mistakes by dna polymerase during dna replication...