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Question
(a) Identify the polarity of x to x’ in the diagram below and mention how many more amino acids are expected to be added to this polypeptide chain.
(b) Mention the codon and anticodon for alanine.
(c) Why are some untranslated sequences of bases seen in mRNA coding for a polypeptide? Where exactly are they present on mRNA?
Solution
(a) x to x’ is `5"’"→ 3"’"`
No more amino acids will be added.
(b) GCA Anticodon is CGU.
(c) The untranslated regions are required for an efficient translation process. They are present before the initiation codon at the 5’ – end and after the stop/termination codon, at the 3’ – end.
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RELATED QUESTIONS
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 __________.
The process of translation is ______.
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 ______.
Which of the following are correct statements for a tRNA molecule?
- 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.
The first phase of translation is ______
Aminoacylation of tRNA also known as ______.
Explain the process of aminoacylation of tRNA and its role in the process of translation.
How does initiation of the translation process occur in prokaryotes? Explain.
