Question

What is the genetic basis for proof that codon is a triplet and is read in a contiguous manner without punctuations?

Answer 1

Answer:

Since there are only four bases which code for twenty different amino acids, the code should be made up of three bases, i.e.,, (4 x 4 x 4) 64 codons, a number more than the required.

If the codon consists of 4 letters, only (4 x4) sixteen codes are possible, which is less than the required.

As the ribosomes moves on mRNA the codons are read in a contagiuos fashion.

Answer 2

Answer :-

• A quadruplet framework is inefficient (4^4 =256) , and since the doublet framework isn't enough(4^2=16), we accordingly end up with the triplet framework.

• Before understanding the subtleties of interpretation and interpretation, geneticists anticipated that DNA could encode amino acids just if a code of in any event three nucleotides was utilized. The rationale is that the nucleotide code must have the option to indicate the arrangement of 20 amino acids. Since there are just four nucleotides, a code of single nucleotides would just speak to four amino acids, to such an extent that A, C, G and U could be meant encode amino acids. A doublet code could code for 16 amino acids (4 x 4).

• A triplet code could make a hereditary code for 64 distinct blends (4 X 4 X 4) hereditary code and give a lot of data in the DNA particle to determine the position of each of the 20 amino acids. At the point when trials were performed to figure out the hereditary code it was seen as a code that was triplet. These three letter codes of nucleotides (AUG, AAA, and so forth.) are called codons.