00:01
What i'm going to answer this question is about mutations.
00:03
Remember that mutations occur in dna.
00:05
Okay, for example, if this is your dna, remember that your dna is going to contain genes.
00:11
Genes are portions of the dna that are going to or have the ability to produce a mrna.
00:16
For example, this is a gene.
00:18
It can produce an mri.
00:21
And then this membrane is going to call for a protein, but the process of translation.
00:27
So if there is a mutation here in the mrna, for example, let's suppose that it is an agent that causes a mutation in the mri, then this protein may be affected, but this is like a particular case.
00:39
It means only this mrna was affected by the gene is still normal.
00:43
So practically once this protein or this mutant protein because of this mutant mrna is destroyed, then the gene is going to continue producing normal mris, and hence normal protein.
00:57
So the mutation in order to be dangerous, it has to be at the level of dna, specifically in a gene.
01:05
So this question says, which is the following does not cause mutations? option a says uv degradation.
01:11
And this option is true, and hence it is not the answer for this question, okay? because uv exposure doesn't always lead directly to mutations in the dna.
01:19
For example, uva, radiation commonly causes the creation of a free radical that they interest with and oxidizes dna basis...