Question

What significance do the bases AUG, or UGA have? hint use decoder chart needed. A. a. the first one is a start codon and the second A one is a stop codon B. bthey transfer Amino Acids to the mRNA O C. c. the first one is a stop codon and the second one is a start codon D. d. they code for proteins

Answer 1

Answer:

The importance of the AUG and UGA bases lies in the fact that the first one is a start codon and the second one is a stop codon, respectively (option a).

Explanation:

Codons or triplets are sequences of three nitrogenous bases, in the mRNA, that determine the synthesis of a specific amino acid.

• AUG is called the initiation or start codon, and is usually at the beginning of a peptide synthesis, in addition to encoding the amino acid methionine.
• UGA is a termination or stop codon found at the end of a petid chain when it is complete.  UAA and UAG codons are also STOP or termination codons and, together with UGA, do not code for amino acids.

The biological importance of start and stop codons is to initiate the synthesis of a protein and to stop the addition of amino acids when their size is adequate.