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Kip Strosin

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3y ago

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What is the stop codon in most molecules of mRNA?

stop codon on mRNA


Is tryptophan the starting codon for mRNA?

No, tryptophan is an amino acid, not a codon. The start codon is AUG, which codes for the amino acid methionine.


What mrna codon starts the maiking of a protein?

The most common start codon is AUG, which codes for the amino acid methionine.


What is the start codon in mRNA and how does it initiate the process of protein synthesis?

The start codon in mRNA is AUG. It initiates the process of protein synthesis by signaling the ribosome to start translating the mRNA sequence into a protein. The start codon also codes for the amino acid methionine, which is the first amino acid in most proteins.


What identifies the specific amino acid for tRNA?

The messenger RNA strand. When the tRNA inserts itself between the two portions of the ribosome attached to the mRNA strand, the specific tRNA depends on the 3 nitrogen bases on the mRNA (the codon) that are about to be read. The tRNA that arrives has a corresponding "anticodon" to go with the codon on the mRNA. For example, if the nitrogen bases on the mRNA strand are adenine, guanine, and cytocine the tRNA will have an anticodon of uracil, cytocine and guanine. The tRNA that has the corresponding anticodon to the codon on the mRNA will bring with it a specific amino acid but it is the codon on the mRNA that ultimately decided which amino acid is next in line.


Which molecules match mRNA codons to specific amino acids?

Starting from the translation start codon in the mRNA molecule, each three bases corresponds to a single amino acid, until you reach the stop signal. Some amino acids have more that one triplet that codes for them (redundancy). Some parts of the mRNA molecule are untranslated and therefore do not correspond to amino acids.


What is the three nucleotide?

Messenger RNA (mRNA) serves as the primary transcript, and its nucleotide sequence determines the amino acid sequence of proteins. A codon in mRNA comprises of three nucleotides that encode a specific amino acid. For example, the codon for glutamine is CAG (Cytosine, Adenine and Guanine). The most common stop and start codon is TAA and AUG respectively.


Where can you find proteins?

This process can be divided into two parts:1. TranscriptionBefore the synthesis of a protein begins, the corresponding RNA molecule is produced by RNA transcription. One strand of the DNA double helix is used as a template by the RNA polymerase to synthesize a messenger RNA (mRNA). This mRNA migrates from the nucleus to the cytoplasm. During this step, mRNA goes through different types of maturation including one called splicingwhen the non-coding sequences are eliminated. The coding mRNA sequence can be described as a unit of three nucleotides called a codon.2. TranslationThe ribosome binds to the mRNA at the start codon (AUG) that is recognized only by the initiator tRNA. The ribosome proceeds to the elongation phase of protein synthesis. During this stage, complexes, composed of an amino acid linked to tRNA, sequentially bind to the appropriate codon in mRNA by forming complementary base pairs with the tRNA anticodon. The ribosome moves from codon to codon along the mRNA. Amino acids are added one by one, translated into polypeptidic sequences dictated by DNA and represented by mRNA. At the end, a release factor binds to the stop codon, terminating translation and releasing the complete polypeptide from the ribosome.One specific amino acid can correspond to more than one codon. The genetic code is said to be degenerate.


A mutation within a gene that will insert a premature stop codon in mRNA would?

Most likely result in mRNA that could not be translated and thus would not give rise to any proteins


What are start condons?

A start codon (there's only one) is the sequence of three bases on mRNA that initiates translation of mRNA into protein. The start codon sequence is AUG (anticodon UAC) which also carries the amino acid methionine.


What are the three bases of mRNA that codes for one amino acid?

A, or the, triplet codon. Four bases taken in groups of three proffer 64 combinations, 20 are used to code for the 20 most common amino acids. Other codons signal Start and Stop.


What is directly responsible for the sequence of amino acids in a protein?

The sequence of amino acids in a protein is directly determined by the sequence of nucleotides in the gene that codes for that protein. This process occurs during protein synthesis, where the genetic information is transcribed from DNA to mRNA and then translated into a specific sequence of amino acids.