Translation of mRNA in bacterial cells begins when A. An amino acid is added to the C-terminus of a polypeptide chain B. The initiator fMet-tRNA binds to a free 30S ribosomal subunit C. Peptidyl transferase catalyzes transpeptidation between adjacent amino acids D. The ribosome disengages from mRNA
Question
Translation of mRNA in bacterial cells begins when A. An amino acid is added to the C-terminus of a polypeptide chain B. The initiator fMet-tRNA binds to a free 30S ribosomal subunit C. Peptidyl transferase catalyzes transpeptidation between adjacent amino acids D. The ribosome disengages from mRNA
Solution
The translation of mRNA in bacterial cells begins when the initiator fMet-tRNA binds to a free 30S ribosomal subunit. So, the correct answer is B.
Here's a step-by-step breakdown:
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The process of translation begins with the binding of the initiator fMet-tRNA to a free 30S ribosomal subunit. This is facilitated by initiation factors and GTP.
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The 30S ribosomal subunit, along with the initiator tRNA, then binds to the mRNA at the start codon (AUG).
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The 50S ribosomal subunit then associates with the 30S subunit to form the complete initiation complex.
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The elongation phase of protein synthesis then begins, with amino acids being added to the growing polypeptide chain.
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The process continues until a stop codon is reached, at which point the ribosome disengages from the mRNA, marking the end of translation.
So, the options A, C, and D are steps that occur after the initial binding of the initiator fMet-tRNA to the 30S ribosomal subunit.
Similar Questions
During the process of translation:Select one:a. The incoming tRNA must first bind to the E siteb. Initiation begins with the binding of the ribosomal larger subunit to the polyA tail of the mRNAc. The peptide is passed from tRNA in the P site to the tRNA at the A sited. The mRNA is translated by one ribosome at a time
Which type of RNA brings amino acids to the ribosome during translation?
Which of the following statements about translation are true.0 / 1 pointPost-translational modifications is the binding of repressor proteins to a sequence found on an mRNA molecule.A ribosome has two subunits. The large subunit finds the mRNA to begin translation, while the small subunit has two sites for amino acids to bind.Translation is performed by ribosomes in both prokaryotes and eukaryotes.Transfer RNA (tRNA) are used to bring the next amino acid to add to the polypeptide chain by matching to the next codon in the mRNA being translated. After the amino acid is added, the tRNA can then be repurposed for a different amino acid and codon pairing.IncorrectThis is incorrect. The small subunit finds the mRNA to begin translation, while the large subunit has two sites for amino acids to bind. The A site accepts transfer RNA (tRNA) bearing an amino acid, while the P site binds the tRNA to the growing chain.
During the mRNA translation, in what site of the ribosome binds the incoming tRNA molecule carrying the amino acid that will be added to the growing polypeptide chain? Z-site E-site W-site P-site A-site
During the process of translation, the growing polypeptide chain is released from the ribosome when:Select one:a. The 7-methylguanosine cap is reachedb. A chain terminating tRNA binds to the ribosomec. The poly A tail is reachedd. A chain terminating codon is reached
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