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प्रश्न
List two essential roles of ribosomes during translation.
State the function of ribosomes as a catalyst in bacteria during the process of translation.
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उत्तर
- They provide a surface for binding of mRNA in the groove of the smaller subunit of ribosomes.
- As a larger subunit of the ribosome has peptide transferase on its ‘P’ site, it helps in joining amino acids by forming peptide bonds.
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संबंधित प्रश्न
Which one of the following is a stop codon?
(a) UAG
(b) UAC
(c) AUG
(d) UCA
An operon is a ______.
The process of translation is ______.
The translation termination triplet is ______.
In an mRNA molecule, untranslated regions (UTRs) are present at ______.
UTRs are the untranslated regions present on ______.
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 ______
The process of translation is ______.
(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?
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.
Where are the untranslated regions located on mRNA and why?
Anticodon loop of tRNA has ______.
Codon on mRNA and anticodon on tRNA are ______.
How many different proteins does the ribosome consist of?
Which molecule acts as the template for translation?
Which of the following is the start codon in 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?
Which site on the ribosome holds the peptidyl-tRNA during translation?
What energy molecules are required during translation?
