In the chain elongation of proteins, the new aminoacyl-tRNA bonds to? a.A site b.E site c.G site d.P site
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In the chain elongation of proteins, the new aminoacyl-tRNA bonds to?
a.A site
b.E site
c.G site
d.P site
Step by step
Solved in 3 steps
- What site on the ribosome is the place where a tRNA molecule leaves the ribosome after attaching its amino acid to the growing chain of amino acids? a. E site b. P site c. A site d. the small ribosomal subunit Please respond as soon as possibleA particular tRNA is mutated so that the amino acid attachment cannot bind with the aminoacyl-tRNA synthase. What happens when an mRNA transcript contains the codon for this TRNA? O A. The tRNA will not bind to this codon. O B. Translation stops and the protein is released. O Č. The wrong tRNA is added to the protein chain. D. Translation stops and the protein remains bound to the ribosome. vered MacBook Air 80 F3 D00 D00 F4 F2 F5 % & 23Once a peptide bond has been formed between the amino acid attached to the TRNA in the P site and the amino acid associated with the TRNA in the A site, what process occurs next? a. translocation of the ribosome along the mRNA b. binding of a new tRNA in the E site C. scanning for the start codon d. release of the peptide from the TRNA
- The sequence of bases in a sample of MRNA was found to be: GGU,AAU,CCU,UUU,GUU,ACU,CAU,UGU a Deduce the sequence of amino acids this codes for. b Determine the sequence of bases in the coding strand of DNA from which this MRNA was transcribed. c Within a cell, state where the triplet codes, codons and anticodons are found.tRNAs a. carry amino acids b. bind to the anticodon present in the mRNA c. adapt the genetic information to the ribosome d. catalyze the peptide bondThe codon UUU in an mRNA molecule which results in phenylalanine being inserted as the protein is made. Which will be a characteristic of this codon? a. The tRNA molecule that binds to the UUU codon must have an AAA anticodon. Nde ba e2? b. UUU could code for both phenylalanine and alanine during translation. c. The aminoacyl-tRNA synthetase for phenylalanine binds only the UUU codon. d. UUU is probably only one of several codons that code for phenylalanine.
- Which translation factor mediates the aminoacyl-tRNA entry into the A site of the ribosome? A. EF-Tu B. EF-Ts C. EF-G D. IF1Use the table to answer: A portion of an mRNA attached to a ribosome reads: 5′ GACCAUUUUGACAAAGUUGUAGUGUGGGUAGGGUGA 3′ If a tRNA with a Phe attached is in the P site of the ribosome, an uncharged tRNA will be present in the E site that delivered which amino acid? What is the last amino acid in this polypeptide? Which amino acid will be the most frequent in the polypeptide?In which site(s) of the ribosome could you find a tRNA with more than one amino acid bound (a peptidyl- TRNA)? a. In both the E- and P-sites. b. In both the A- and P-sites. С. Only in the A-site. d. Only in the P-site. e. Only in the E-site.
- Choose the answer that has these events of protein synthesis in the proper sequence. 1. A TRNA binds to the A site. 2. A peptide bond forms between the new amino acid and the growing polypeptide chain. 3. TRNA vacates E site as the next tRNA binds to the A site. 4. Both ribosomal subunits have bound, and the first TRNA is in the P site. 5. TRNA translocates to the P site, as upstream tRNA translocates to E site. O 4, 1, 3, 2, 5 ) 1, 3, 2, 4, 5 4, 1, 2, 5, 3 2, 4, 5, 1, 3 5, 4, 3, 2, 1The addition of the poly-A tail adds more than 200 units of adenine to the strand of mRNA, yet no protein has a continuous line of more than 200 phenylalanines in its structure. Why is this so? A. RNA splicing occurs and removes the noncoding sequences. B. The poly-A tail and 5' GTP cap do not translate into proteins. C. The adenines are reabsorbed by the cell and help to form other forms of RNA. D. The tRNA does not recognize the poly-A tail.What is the genetic code? a. The relationship between a three-base codon sequence and an amino acid or the end of translation b. The entire base sequence of an mRNA molecule c. The entire sequence from the promoter to the terminator of a gene d. The binding of tRNA to mRNA