Which of the following is not true? There are two major classes of aminoacyl-tRNA synthetases The selectivity of the aminoacyl-tRNA synthetases for their tRNA molecules is often called the second genetic code A single activating enzyme can interact with all the tRNAs for its corresponding amino acid aminoacyl-tRNA synthetases link amino acids to tRNA molecules without the need for an energy source

Which of the following is not true? There are two major classes of aminoacyl-tRNA synthetases The selectivity of the aminoacyl-tRNA synthetases for their tRNA molecules is often called the second genetic code A single activating enzyme can interact with all the tRNAs for its corresponding amino acid aminoacyl-tRNA synthetases link amino acids to tRNA molecules without the need for an energy source

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter9: Gene Expression And Gene Regulation

Section: Chapter Questions

Problem 17QP: Given the following mRNA, write the double-stranded DNA segment that served as the template....

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The following is a portion of a protein: met-trp-tyr-arg-gly-pro-thr-Various mutant forms of this protein have been recovered. Using the normal and mutant sequences, determine the DNA and mRNA sequences that code for this portion of the protein, and explain each of the mutations. a. met-trp- b. met-cys-ile-val-val-leu-gln- c. met-trp-tyr-arg-ser-pro-thr- d. met-trp-tyr-arg-gly-ala-val-ile-ser-pro-thr-
Given the following tRNA anticodon sequence, derive the mRNA and the DNA template strand. Also, write out the amino acid sequence of the protein encoded by this message. tRNA: UAC UCU CGA GGC mRNA: protein: How many hydrogen bonds would be present in the DNA segment?
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 of the following cannot be said regarding aminoacyl tRNA synthetase? It is essential for the correct reading of codons. A single tRNA synthetase can attach different amino acids to their corresponding tRNA. It is first activated when it catalyzes a reaction between ATP and an amino acid to form an aminoacyladenylic acid (amino acyl-AMP). It is responsible for the attachment of the correct amino acid to the correct tRNA. There is a different tRNA synthetase for each amino acid that will be attached to a tRNA.
Which of the following is true regarding the tRNA structure? The anticodon is found at the 5′ end of the tRNA molecule. An amino acid binds to the 3' end of the tRNA molecule. An amino acid binds to the anticodon of the tRNA molecule. The nucleotides found in a tRNA molecule can only be adenine, uracil, guanine, and cytosine. One region of the tRNA contains a codon and another region of the tRNA contains an anticodon.
Which of the following is/are required in the amino acid activation by aminoacyl-tRNA synthetase? A. tRNA B. Mg2+ C. GTP D. mRNA E. amino acid F. ATP G. rRNA
How does the cell ensure that a specific amino acid (say, valine) attaches itself only to the one tRNA molecule that is specific for valine? (A) Proteins called aminoacyl DNA synthetases are responsible for bringing together the proper pair. The enzymes match the amino acid and one of the correct DNA molecules carrying the right anticodon. (B) Lipids called aminoacyl tRNA synthetases are responsible for bringing together the proper pair. The lipid binds the amino acid and one of the correct tRNA molecules carrying the right codon. (C) Enzymes called aminoacyl tRNA synthetases are responsible for bringing together the proper pair. The enzymes match the amino acid and one of the correct tRNA molecules carrying the right anticodon. (D) Enzymes called peptidyl mRNA synthetases are responsible for bringing together the proper pair. The enzymes match the amino acid and one of the correct mRNA molecules carrying the right anticodon.
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
Which statement BEST DESCRIBES the tRNA structure? Chooose from the options below. Amino acids bind to the 5′ end of the tRNA molecule. When a tRNA has an amino acid attached to it, it is considered to be a charged tRNA Synthetases are not important to tRNA Amino acids are linked to tRNAs with hydrogen bonds
A mutation is found in a tRNA-encoding gene. The wild type (non-mutant) allele (version) produces a tRNA that recognizes the codon GAA, and is charged with the amino acid glutamic acid (Glu). The mutant tRNA is still charged with Glu, but it recognizes the codon UAA. What effect will this have on translation in these cells? How will the proteins produced be different? Speculate: is this mutation more likely to be beneficial or harmful?
DNA in human mitochondria encodes 22 different tRNA molecules. However, 32 different tRNA molecules are required for translation of proteins within mitochondria. Explain.
Group of nucleotides that confers specificity for the appropriate aminoacyl-tRNA synthetase is called an: Group of answer choices 3'CCA Tail Lateral Element Identity Element Acceptor Stem