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The answer is nine because one codon has 3 letters.

Improved Answer

The 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

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βˆ™ 12y ago
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βˆ™ 13y ago

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.

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βˆ™ 13y ago

A codon of three bases codes for a single amino acid, therefore three codons should code for three amino acids.

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βˆ™ 13y ago

9.

here is an example.

ACT GCA GTC

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Q: How many codons are needed to specify three amino acids 6 or 9?
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Related questions

How many codons are needed too specify three amino acids?

3


How manny codons are needed to specify three amino acids?

three. (= 9 nucleotides)


How do amino acids specify codons?

Nucleutoides.


How many codons specify the twenty types of amino acids?

46


How many nucleotides are needed to specify three acids?

Nine nucleotides are needed to specify three amino acids.


How many codons are needed to code for a protein that has 50 amino acids?

150 bases are needed for 50 codons .


How many protein-coding codons are there?

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


A codon is a triplet base sequence?

mRNA


How many codons are neede to specify two amino acids?

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.


How many codons are needed to specify 2 amino acids?

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


How many codons would be needed if a bacterial protein contains 150 amino acids?

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.


What 3 codons do not carry amino acids?

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).