Question

What is the start codon?

Answer 1

Answer:

The start codon is the first codon of a messenger RNA transcript translated by a ribosome. The start codon always codes for methionine in eukaryotes and Archaea and a N-formylmethionine in bacteria, mitochondria and plastids. The most common start codon is AUG

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Answer 2

Answer:

The start codon is the first codon of a messenger RNA transcript translated by a ribosome. The start codon always codes for methionine in eukaryotes and Archaea and a N-formylmethionine in bacteria, mitochondria and plastids. The most common start codon is AUG.

The universal genetic code is made up of several codons or triplet bases. The standard code has evolved over time to minimize coding errors. There are a total of 64 codons in the genetic code arising from the permutation and combination of the 4 bases in nucleic acids.

The genetic code is degenerate i.e. more than one codon can code for a single amino acid. Due to this, of the 64 codons, 61 codons code for the 20 amino acids.

There are two punctuation marks in the genetic code called the START and STOP codons which signal the end of protein synthesis in all organisms.