An enzyme known as ___________________ attaches an amino acid to the_________________ of a tRNA, thereby producing_______________ . a. aminoacyl-tRNA synthetase, anticodon, a charged tRNA b. aminoacyl-tRNA synthetase, 3′ single-stranded region of the acceptor stem, a charged tRNA c. polynucleotide phosphorylase, anticodon, a charged tRNA d. polynucleotide phosphorylase, anticodon, an aminoacyl-tRNA

An enzyme known as ___________ attaches an amino acid to the_ of a tRNA, thereby producing_______ . a. aminoacyl-tRNA synthetase, anticodon, a charged tRNA b. aminoacyl-tRNA synthetase, 3′ single-stranded region of the acceptor stem, a charged tRNA c. polynucleotide phosphorylase, anticodon, a charged tRNA d. polynucleotide phosphorylase, anticodon, an aminoacyl-tRNA

Name: An enzyme known as ___________________ attaches an amino acid to the__
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Description: An enzyme known as ___________________ attaches an amino acid to the_________________ of a tRNA, thereby producing_______________ .a. aminoacyl-tRNA synthetase, anticodon, a charged tRNAb. aminoacyl-tRNA synthetase, 3′ single-stranded region of the a

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter7: Gene Expression And Control

Section: Chapter Questions

Problem 1CT

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A 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? A. The tRNA will not bind to this codon. B. Translation stops and the protein is released. C The wrong tRNA is added to the protein chain. D. Translation stops and the protein remains bound to the ribosome.
Which 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
Which 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 bonds
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 enzyme
The 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 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 these
Suppose that a gene underwent a mutation that changed a GAA codon to UAA. (a) Name the amino acid encoded by the original triplet. (b) Identify a tRNA anticodon that could translate the nonsense UAA triplet. (c) What other amino acid could be encoded by the mutant tRNA?
_______ are removed from new mRNAs. a. Introns c. Poly-A tails b. Exons d. Amino acids
Identify the features of tRNA that are important in decoding genetic information and converting it into protein language.
The number of codon binding sites in an mRNA-ribosome complex that can be occupied at the same time by activated tRNA molecules is; * A. 2 B. 3 C. 4 D. 5 Which is a characteristics of the normal genetic code? * A. one codon can code for only one amino acid B. one amino acid can have only one codon C. one tRNA molecule can bind to only one codon D. one aminoacyl-tRNA synthetase can react with only one tRNA Which of the following describes the effect of a point mutation on amino acid identity in a protein? * A. The identity of two amino acid must change B. The identity of one amino acid may change C. The identity of one amino acid must change D. The identity of one amino acid never change Which of the following statements is true regarding introns? *…
Which of the following best describes tRNA? a. Provides the instructions for the amino acid sequence of a polypeptide b. Complexes with ribosomal proteins to form ribosomes c. Used for eukaryotic RNA processing d. Transports amino acids to ribosomes during translation
Describe the structural features that all tRNA molecules have in common.