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There are 64 codons, that code for only 20 amino acids. This make the genetic code redundant - because different codons can code for the same amino acid.
This provides some protection against mistakes - because a replacement of a single base may end up coding for the same amino acid - causing no change to the final protein product.
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Which statement best explains why some changes in DNA sequence do not change the corresponding protein?
Some changes in DNA sequence do not change the corresponding protein because of redundancy in the genetic code. This means that multiple codons can code for the same amino acid, providing a buffer against some mutations. Additionally, silent mutations can occur where a nucleotide change does not affect the amino acid sequence due to the degeneracy of the genetic code. Lastly, changes in non-coding regions of DNA do not impact protein sequences but can still affect gene regulation.
Is mRNA used to carry the genetic code from DNA to ribosomes?
mRNA carries the genetic code to a ribosome.
DNA is the nucleic acid responsible for transcribing the genetic code?
Not exactly. DNA contains the genetic code; RNA is what transcribes it.
Is there another genetic code besides DNA?
N, all currently know Animals and Plants have DNA as their genetic code.
Why is the mRNA code for amino acids said to be redundant?
The code for creating amino acids is said to be redundant because some codons code for the same amino acid (i.e. there is redundancy because several codons have the same function). For example, the RNA codons AAA and AAG both code for the amino acid Lysine. The codons ACU, ACC, ACA and ACG all code for Threonine.
