Question

information in genes is stored in dna. are the codons in this codon chart represented as dna or rna?
dna
rna
either dna or rna
notice that some of the codons in the chart have the word \stop\ or \start\ next to them. these are considered punctuation codons. a start codon determines where the sequence of amino acids in the protein will start. a stop codon signals that translation should end; the previous amino acid becomes the last amino acid in the protein.
analyze the codon chart again. how many of each type of punctuation codon are there?
20 start codons and 20 stop codons
64 start codons and 64 stop codons
three start codons and one stop codon
one start codon and three stop codons

Explanation:

• First question: Codons in the codon chart are RNA. During translation, mRNA (messenger RNA) with codons is used. DNA is not directly used in the codon - based translation process.
• Second question: In the standard genetic code, there is 1 start codon (AUG) and 3 stop codons (UAA, UAG, UGA).

Answer:

• First question: RNA
• Second question: One start codon and three stop codons