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प्रश्न
To initiate translation, the mRNA first binds to ______.
पर्याय
The smaller ribosomal sub-unit
The larger ribosomal sub-unit
The whole ribosome
No such specificity exists
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उत्तर
To initiate translation, the mRNA first binds to the smaller ribosomal sub-unit.
Explanation:
To initiate translation, the messenger RNA (mRNA) molecule first binds to the smaller ribosomal sub-unit. In its inactive state, the ribosome exists as two separate pieces, the large and small subunits. The process begins when the small subunit recognises and binds to the mRNA strand, often scanning for the start codon (AUG). Once this initial binding occurs and the initiator tRNA is in place, the larger ribosomal sub-unit then joins the complex to form a complete, functional ribosome that can begin building the protein chain.
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संबंधित प्रश्न
Explain the process of making heterogeneous nuclear RNA (hnRNA) into a fully functional mRNA in eukaryotes. Where does this process occur in the cell?
Regulatory proteins are the accessory proteins that interact with RNA polymerase and affect its role in transcription. Which of the following statements is correct about regulatory protein?
Methyl guanosine triphosphate is added at 5' end of hn-RNA in a process of ______.
If the base sequence of a codon in mRNA is 5'-AUG-3', the sequence of tRNA pairing with it must be ______.
The amino acid attaches to the tRNA at its ______.
In eukaryotes, the process of processing of primary transcript involves ______.
On the ribosome, mRNA binds ______ and two sites in the ______ for subsequent amino acids to bind to be close enough to each other for the formation of a peptide bond.
The most abundant type of RNA in the cell is ______.
Which of the following pair lack the unit membrane?
Which enzymes are responsible for the synthesis of tRNA?
Refer the given diagram. What does it represent?
What is the role of RNA polymerase III in the process of transcription in eukaryotes?
Identify the correct statement.
What are the functions of poly-A “tail” in a mature on RNA?
Observe the segment of mRNA given below.
(a) Explain and illustrate the steps involved to make fully processed hnRNA?
(b) Gene encoding RNA Polymerase I and III have been affected by mutation in a cell. Explain its impact on the synthesis of a polypeptide, stating the reasons.
- Assertion: Ribosomal RNA is synthesized in the nucleus of the cell.
- Reason: It is translated with the enzyme RNA polymerase III.
