The answer is nine because one codon has 3 letters.
Improved AnswerThe above answer is completely incorrect. The question is how many codons are necessary to specify three amino acids, not bases (letters). As my original answer (which was removed by the previouis contributor) pointed out, each amino acid requires one codon to specify it, so the basic answer is, three codons are necessary to specify any three amino acids. However, if the questioner had in mind how many codons are necessary to specify a polypeptide consisting of three amino acids, the answer is five, because, in addition to the three codons necessary for the amino acids, a start codon of AUG (on the mRNA transcript), and one stop codon (UAG, UGA,or UAA on the mRNA transcipt) are also needed. So, in this sense, five codons are needed to specify a polypeptide of 3 amino acids.
Improved Answer: The answer is 9. ^ fail XD
to code for one aminoacid one codon,ie, three nucleotidal sequences are required.but to specify a polypeptide consisting of three aminoacids,5 codons are required.1 initiating codon-AUG,three coding codons and a stopping codon-UUG,UGA or UAG.
A codon of three bases codes for a single amino acid, therefore three codons should code for three amino acids.
9.
here is an example.
ACT GCA GTC
In order to create two amino acids, you would need two codons, which is 6 bases (Adenine, Guanine, Thymine, or Cytosine) because a codon is a group of three bases.
mRNA
each codon have 3 nitrogenous bases . 3 nitrogenous bases = 1 amino acid or say 1 codon =1 amino acid ,so 2 codon = 2 amino acid
i think nine bases are needed for three amino acids because i think it takes three bases to make one amino acid
tRNA
3
three. (= 9 nucleotides)
Nucleutoides.
46
Nine nucleotides are needed to specify three amino acids.
150 bases are needed for 50 codons .
61 codons specify the amino acids used in proteins and 3 codons (stop codons) signal termination of growth of the polypeptide chain...so 64 total
mRNA
In order to create two amino acids, you would need two codons, which is 6 bases (Adenine, Guanine, Thymine, or Cytosine) because a codon is a group of three bases.
each codon have 3 nitrogenous bases . 3 nitrogenous bases = 1 amino acid or say 1 codon =1 amino acid ,so 2 codon = 2 amino acid
1. the start codon 2. 150 codons, 1 for each amino acid 3. the stop codon The total number of different codons is 64...if this question is asking about unique codons used the answer will depend on which amino acids are in the peptide.
There are three codons that do not code for any amino acids: the stop codons. These are TAG, TAA, and TGA (in DNA, not RNA).