Who proposed that the genetic code for amino acids should be made up of three nucleotides?

Which codons signal the termination of the polypeptide chain?

Which of the following statements is true regarding the genetic code?

The genetic code was deciphered by chemical synthesis of trinucleotides by:

Suppose evolution on Earth occurred in such a way that instead of $20$ amino acids,there were $96$ amino acids. If $DNA$ consisted of $12$ different types of bases and $DNA$ synthesis occurred in the same manner,what would be the minimum number of bases required for each $DNA$ codon?

Which is the initiation codon for protein synthesis in eukaryotes?