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Question
Which of the following is true with respect to AUG?
Options
It codes for methionine only
It is an initiation codon
It codes for methionine in both prokaryotes and eukaryotes
All of the above
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Solution
All of the above
Explanation:
The codon AUG is unique because it serves as the universal initiation codon, signalling the ribosome to begin the process of translation. Beyond its role as a “start” command, it is the only codon that codes for the amino acid methionine, ensuring that this specific building block is the first one incorporated into most protein chains. This function is highly conserved across the tree of life, as AUG codes for methionine in both prokaryotes and eukaryotes, though prokaryotes use a slightly modified version called fMet for the starting position.
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RELATED QUESTIONS
List two essential roles of ribosomes during translation.
Briefly describe the following:
Translation
Ribosomes are composed of two subunits; the smaller subunit of a ribosome has a binding site for _________ and the larger subunit has two binding sites for two __________.
An operon is a ______.
The process of translation is ______.
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The three codons which result in the termination of polypeptide chain synthesis are ______.
During translation, activated amino acids get linked to tRNA. This process is commonly called as ______.
Regulation of gene expression occurs at the level of ______.
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- It is an adapter molecule.
- Previously called sRNA (soluble RNA)
- tRNA has a codon loop that has bases complementary to the code,
- it also has an amino acid accepter end to which it binds to amino acids.
- It is non-specific for each amino acid.
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The process of translation is ______.
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Where are the untranslated regions located on mRNA and why?
Codon on mRNA and anticodon on tRNA are ______.
How many different proteins does the ribosome consist of?
What is a triplet codon?
Which molecule acts as the template for translation?
What are the three stop codons that signal the termination of translation?
Which enzyme is responsible for activating amino acids and attaching them to the correct tRNA?
During the elongation stage of translation, what ensures that the correct amino acid is placed in the sequence?
Which ribosomal site receives the incoming aminoacyl-tRNA during translation?
During elongation, what bonds are formed between adjacent amino acids?
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