0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Do stop codon have an amino acid?
A stop codon (UGA, UAA, UAG) only codes for a stop. No amino acid results from a stop codon.
What do you mean by stop codons?
a stop codon (or termination codon) is a nucleotide triplet within messenger RNA that signals a termination of translation.Three codons UAG,UAA & UGA are the stop codons, which denotes the end of the protien.
What is the consequence of changing the codon UGA to UGG?
UGA stands for Threonine. UGG stands for Threonine. Nothing would change. This is none as a silent mutation. Source: AP Biology Student and a DNA-Codon to Amino acid chart ^ actually, according to my chart, UGA is a stop codon and UGG stands for TRYPTOPHAN (not threonine), also UGG is the ONLY codon that codes for tryptophan, so it isn't a silent mutation, either. the correct answer is that the peptide will be longer than normal.
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"
How is the nucleotide seguence in the mRNA translated into a polypeptide sequence?
As we all know, mRNA undergoes translation to form a polypeptide sequence. Besides the mRNA, there are still the tRNA ( transfer RNA ) and rRNA ( ribosomal RNA ). All these three types of RNA are essential in determining the polypeptide sequence. This is the because, mRNA only acts as a messenger. A messenger to bring the information from the DNA to the ribosome to synthesis protein. the tRNA transports the required amino acid to form the polypeptide refering to the mRNA while the rRNA builds a site for the polypeptide synthesis to occur. For translation to occur, the essential components are required : tRNA with it's anticodons to the start codon - UAC - ( start codon = AUG- methionine). the subunits of the ribosomal RNA and the mRNA that needs to be translated. i)the tRNA with the correct anticodons binds to the start codon. ii) the next tRNA recognizing the next codon locates itself on the ribosome and the first tRNA is transferred by ribosome. iii) Once the amino acid are in place, peptide bonds are formed between them and a polypeptide chain is formed. the first tRNA leaves the ribosome while the next tRNA takes it's place. As another tRNA recognizes the next codon, it locates itself on the ribosome once more. iv) Translation goes on until the ribosome reaches either one of the stop codon. -- UAA / UAG/ UGA.. found on the mRNA. v) When the ribosome arrives at the stop codon, translation stops. The ribosome splits to it's two sub units, and the newly synthesized polypeptide chain is released from the mRNA. vi) the tRNA and rRNA can be reused to form new polypeptides on other mRNA strands.
What will happen if the ribosome reads uaa uag or uga?
If you are asking this question to cheat at school shame on you. But I don't care I don't know you, I'm not your parent or teacher. It will read "STOP". actually, this answer is correct. When the ribosome reads uaa, uag, or uga, these sequences are known as stop codons. It will read stop. Also, no tRNA can bind to a stop codon... there are no tRNAs with anticodons complementary to the termination codons, so no tRNA enters the A site of the ribosome. Release factors are induced. RF1 to either UAA or UAG, RF2 to either UGA or UAA. RF3 forms a complex with GTP (energy source) and binds to the ribosome. These release factors promote cleave of the tRNA in the P site. GTP is hydrolyzed (reduced) to GDP. The tRNA is released from the P site, mRNA is released from the ribosome, and the ribosome leaves. -zdrum
When does translation end?
Translation ends when a stop codon is reached. The stop codons are: * UAA * UAG * UGA
Where do you find a anticodon?
Codon is found on the messenger RNA(m RNA).During translation, the codons on the m RNA are read by the ribosome and amino acid corresponding to the codon is added. when ribosome encounters a stop codon (UAG,UGA and UAA) translation terminates.
What is non sense codon?
A nonsense codon is nucleotide triplet that does not code for an amino acid, but rather it promotes the stop of transcription. These codons include UAA, UGA, and UGA.
Which mRNA codons will start the process of translation?
If you're referring to stop codons, then there are three: UAA, UAG and UGA. They do indeed stop translation, though I wouldn't say they halt ribosomes. Stop codons code for a releaser enzyme, one that fits the A site of the ribosome, but does not carry an amino acid. This enzyme cuts the bond between the polypeptide and the last tRNA.
What is the function to stop a codon?
the stop codon uaa, uag, or uga triggers the ending of the transcription process
What causes translation to stop?
The end of translation occurs when the ribosome reaches one or more STOP codons (UAA, UAG, UGA) on the mRNA. At the ribosomal level, there is a competition between tRNAs and release factors. When a stop codon is reached, a release factor inserts into the A-pocket of the ribosome (keep in mind that a tRNA molecule cannot recognize a stop codon). Once the release factor is recognized by the ribosome, the polypeptide chain is signaled to release.
Do stop codon have an amino acid?
A stop codon (UGA, UAA, UAG) only codes for a stop. No amino acid results from a stop codon.
How does the termination of translation occur?
The termination of protein translation is caused by termination codon. Termination happens when a stop codon is reached, there is no amino acid to be incorporated and the entire assembly releases the newly synthesized polypeptide.
What codon starts polypeptide synthesis?
The codons are UAA,UAG and UGA
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
What do you mean by stop codons?
a stop codon (or termination codon) is a nucleotide triplet within messenger RNA that signals a termination of translation.Three codons UAG,UAA & UGA are the stop codons, which denotes the end of the protien.
