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There are 2 stop codons and 2 start codons

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Q: How many start and stop codons are there?
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A codon is a triplet base sequence?

mRNA


How many codons are in aaaugcucguaa?

There are four codons in AAA UGC UCG UAA. A codon is a sequence made of three nitrogenous bases. Codons have particular features, making it possible for them to be start codons, stop codons, introns, or exons.


Does every codon represent an amino acid?

No, not every codon represents an amino acid. There are several codons known as "stop" codons (UGA, UAA, UAG) that do not code for an amino acid; instead they code for the termination of translation.


What are the universal stop codons?

Stop: UAG, UGA, UAA Start: AUG


What codons stop protein synthesis?

UAA, UAG, and UGA are stop codons.Sequence UAA, UAG, and UGA are the three stop codons. There is only one start codon, AUG.


What marks the beginning and the ending of a gene on a DNA molecule?

start and stop sequences Also called Star and Stop codons. These are base triplets in the DNA base sequence. Examples of Stop Codons ar TAG or TGA.


What are sequences of nitrogenous bases in RNA that do not make proteins called?

They code for "start" and "stop" and are called stop and stop codons.


What determines where on the DNA molecule transcription begins and where it ends?

I think you are referring to translation - translation is the process of replicating the DNA sequence in order to produce a code for the production of a particular protein, known as an mRNA strand. This code is read in sequences of three bases known as codons. The beginning and end of the mRNA strand is determined by start and stop codons. Start codons, unlike stop codons, also need nearby sequences and initiation factors in order to begin translation. Start codons include base sequences of usually AUG or possibly GUG or UUG depending on the organism. There are three stop codons and these are UAG, UGA and UAA


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 functions are carried out by those few codons tat do not code for amino acid?

They(UAA, UAG, & UGA stop codons) cause the ribosome to stop translating an mRNA


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


What what and what are stop codons?

The start codon on a messenger RNA strand marks the start point of translation from RNA to protein. It is nearly invariably AUG (which translates to the amino acid methionine). Tip for remembering: "Are you good?" The stop codon on the other hand marks the end point of translation. It can be UAG, UAA or UGA. Tip for remembering: "You are good"/"You are awful"/"You are good and awful"