How is translation initiated?Group of answer choicesTwo ribosomal subunits bind to the mRNA transcript.DNA helicase binds to the origins of replication.RNA polymerase binds to the promoter sequence.Two ribosomal subunits bind to the DNA sequence.
Question
How is translation initiated?Group of answer choicesTwo ribosomal subunits bind to the mRNA transcript.DNA helicase binds to the origins of replication.RNA polymerase binds to the promoter sequence.Two ribosomal subunits bind to the DNA sequence.
Solution
Translation is initiated when two ribosomal subunits bind to the mRNA transcript. Here are the steps:
-
The small ribosomal subunit binds to the mRNA transcript. This is facilitated by initiation factors that help in the binding process.
-
The small subunit then scans the mRNA transcript for the start codon (AUG).
-
Once the start codon is found, the appropriate tRNA molecule carrying the corresponding amino acid (methionine) binds to the start codon via its anticodon.
-
The large ribosomal subunit then binds to the small one, forming the complete initiation complex.
-
The ribosome is now ready to begin the elongation phase of protein synthesis.
So, the correct answer is "Two ribosomal subunits bind to the mRNA transcript."
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
List the steps of translation in correct order.Rank the options below.A ribosome binds to mRNA.A ribosome binds to mRNA. open choices for rankingThe tRNA is released from the ribosome and is available to pick up another amino acid.The tRNA is released from the ribosome and is available to pick up another amino acid. open choices for rankingA tRNA anticodon binds to a complementary mRNA codon.A tRNA anticodon binds to a complementary mRNA codon. open choices for rankingA new amino acid is linked to the growing peptide chain.
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
Which of the following is a step in translation?Group of answer choicesActivation of amino acidsSynthesis of mRNAsSynthesis of an RNA primerBinding of DNA and RNA together
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.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.