When would a mutation in DNA not cause a change in how the gene is expressed or in which proteins are made?
If a point mutation occurs in a location that is not critical to the structure and function of the protein, it will not change the way the gene is expressed. Also, since most amino acids have more than one codon, if the point mutation resulted in a codon for the same amino acid without the mutation, it will not change the way the gene is expressed.
The proteins are coded in DNA. So the gene expression cause RNA and proteins in solely depend on message in DNA. When there is accuracy in DNA (without any mutation), there will authentic proteins. If any change occurs in the DNA sequence that may form premature or dysfunctional proteins due to the change in amino acids.
Which do you suppose would be more harmful A mutation that changed the nucleotide sequence of an mRNA molecule or a mutation that changed the nucleotide sequence of a DNA molecule?
A mutation in a DNA nucleotide sequence would be more harmful than a mutation in a mRNA nucleotide sequence because it could cause the synthesis of multiple nonfunctional proteins in comparison to a mutation in a mRNA nucleotide sequence that would be less harmful because it would result in a few nonfunctional proteins.
The function of a protein is determined by the sequence of amino acids in the protein. A genetic mutation can cause a change in the sequence of nitrogen bases in the DNA. This could cause an error in the sequence of amino acids in a protein, which can cause the protein to function improperly or not at all.