Which is the chain initiation codon?
AUG is the initiation codon. Translation starts with a chain initiation codon or start codon and terminates with a stop codon. The start codon is the first codon of a messenger RNA (mRNA) transcript translated by a ribosome.
What is termination codon give its example?
During translation, the polypeptide chain ends with the signal of codons and those codons are called nonsense codons or termination codons. UAG, UAA, and UGA are the three stop codons which terminate the polypeptide chain process.
What is the function of chain initiation and termination codon?
Difference between Start Codon and Stop Codon
|Start Codon||Stop Codon|
|Start codon is a site where the protein translation initiates.||The stop codon marks the termination of the translation process.|
|The standard start codon is AUG.||The standard stop codon is UAG, UGA and UAA.|
What are 3 codons act as termination signals?
The codons UAA, UAG, and UGA are the stop codons that signal the termination of translation.
Which of the following is not a chain termination codon?
Solution : AUG is not a termination codon, it is initiator codon.
What is similar in UAA UAG UGA?
The correct option is (B) Nonsense codons.
Is UGA stop codon?
Stop codons (UAA, UAG or UGA) are recognized by release factors which bind into the A-site and use an activated water molecule to hydrolyze the ester linkage between the completed polypeptide and tRNA.
Which of the following is not a chain termination codon UAA UGA UAG UGG?
Which of the following is not a chain termination codon? Explanation: The universal chain termination codons are UAA, UAG and UGA. UGG codes for tryptophan according to the universal genetic code. Explanation: The first amino acid added is methionine which is coded by the codon AUG.
Which of the following serves as a termination codon a AUG B CGC C UAG D Gug?
Correct Answer is: (C) UAA There are 3 STOP codons in the genetic code – UAG, UAA, and UGA. These codons are also known as nonsense codons or termination codons as they do not code for an amino acid.
Why are UGA UAG and UAA called termination codons because?
Solution. UGA, UAG, UAA are called termination codons tRNA participates in translation process.
Which one isn ot the nonsense codon A UAA B UGA C UCA D UAG?
Which one is not a termination codon 1 UAA 2 UAG 3 Aug 4 UGA?
Which codons are called start signals UAA Aug gug UAA UAG Aug Aug gug Uuu Aug?
The first codon is called the start codon which initiates the translation is AUG i.e methionine. The Amino acid chain synthesises till it reads the stop codons- UAA, UGA, UAG. Once the stop codon is transcribed, protein synthesis stops.
Which of the following is a termination codon a AAA B UAG C Aug D UUA?
This is known as the termination codon or stop codon. There are three termination codons, and they are – UAA, UAG & UGA. – Among the given options, AUG is the start codon, UAC codes for Tyrosine and UCA codes for Serine, whereas UAG is the stop codon. Thus, the correct answer is A, i.e. UAG.
Which codon is related to UAG and UAA in functioning?
Stop codons are nucleotide triplets in messenger RNA (mRNA) that serve a key role in signaling the end of protein coding sequences (e.g., UAG, UAA, UGA). Premature stop codons are those that occur within the normal coding sequence due to a mutation.