The "charging" of tRNA requires which of the following? Select all that apply. Select one or more: O a. ATP O b. Aminoacyl tRNA synthetase O c. TRNA lacking an amino acid O d. aminoacyl TRNA
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- Which part of a tRNA molecule acts as an amino acid attachment site? a. the 5' end b. the 3' end c. the anticodon d. any of theseWhich statement BEST DESCRIBES the tRNA structure? A. Amino acids bind to the 5′ end of the tRNA molecule. B. When a tRNA has an amino acid attached to it, it is considered to be a charged tRNA C. Synthetases are not important to tRNA D. Amino acids are linked to tRNAs with hydrogen bondsWhich of the following is not true? A.) A single activating enzyme can interact with all the tRNAs for its corresponding amino acid B.) The selectivity of the aminoacyl-tRNA sunthetases for their tRNA molecules is oftern called the second Genetic code C.) There are two major classes of aminoacyl-tRNA syntetases D.) Aminoacyl-tRNA synthetases link amino acids to tRNA molecules without the need for an energy source
- The peptide bond formation a. occurs when two tRNAs are located inside the P and A site in the ribosome b. occurs when the anticodon recognizes the codon c. occurs when two tRNAs come in close proximity in the cell d. occurs with the help of the tRNAase enzymeIf a tRNA has an anticodon with the sequence 5′-CAG-3′, which amino acid does it carry? a. Aspartic acid c. Leucine b. Valine d. GlutamineIn which of the ribosomal sites, the A site, P site, and/or E site, could the following be found? A. A tRNA without an amino acid attached B. A tRNA with a polypeptide attached C. A tRNA with a single amino acid attached
- Which of the following is true about tRNA? Select one: A. All tRNAs have a CCA sequence at the 3'-end. B. All tRNAs have a CCG sequence at the 5'-end. C. All tRNAs have a CAC sequence at the 3'-end. D. All tRNAs have a CCA sequence at the 5'-end. E. All tRNAs have a CCG sequence at the 3'-end.Which of the following would explain the formation of double-stranded loops in tRNA? A. complementary base pairing B. steric interactions between the aromatic rings of the purine bases C. electronic interactions between the negatively-charged phosphate groups D. change in the conformation of the rings of the sugarsThe peptide bond formation is catalyzed by a. the aminoacyl tRNA synthetase b. tRNA c. the small ribosomal subunit d. the large ribosomal subunit
- tRNA enzyme. Any given aminoacyl-tRNA synthetase: a. Attaches the amino acid to the 5′-end '5end of the tRNA b. Always recognizes only one specific tRNA c. Recognizes all tRNA molecules d. Forms an ester linkage between the amino acid and the tRNAThe 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.The anticodon of a particular tRNA molecule is(A) complementary to the corresponding mRNA codon.(B) complementary to the corresponding triplet in rRNA.(C) the part of tRNA that bonds to a specific amino acid.(D) catalytic, making the tRNA a ribozyme.