Question 6The genetic code is considered redundant because:It is prone to mutationsThe same mRNA codon actually codes for multiple amino acids.A given amino acid can be coded by more than one mRNA codon.O The genetic code is not at all considered to be redundant. Which of the following is true about amino acyl tRNA synthetase?O It binds both an ATP molecule and an amino acid within its active site.Each amino acyl tRNA synthetase is specific for a given a amino acid.O It links AMP to the COOH end of an amino acid.It links an amino acid to the 3' end of the correct tRNA molecule.O All of the above are true.

Name: Question 6The genetic code is considered redundant because:It is pron
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Description: Question 6The genetic code is considered redundant because:It is prone to mutationsThe same mRNA codon actually codes for multiple amino acids.A given amino acid can be coded by more than one mRNA codon.O The genetic code is not at all considered to

Introduction: The creation of a polypeptide by messenger RNA (mRNA) is known as translation. The…

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Question 6 The genetic code is considered redundant because: It is prone to mutations The same mRNA codon actually codes for multiple amino acids. A given amino acid can be coded by more than one mRNA codon. O The genetic code is not at all considered to be redundant.

Question 6 The genetic code is considered redundant because: It is prone to mutations The same mRNA codon actually codes for multiple amino acids. A given amino acid can be coded by more than one mRNA codon. O The genetic code is not at all considered to be redundant.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter15: From Dna To Protein

Section: Chapter Questions

Problem 4TYK

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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.
ADP ribosylation is one example of post-translational modification of an enzyme. Which statements about the process is true? ADP ribosylation will affect protein folding because of the addition of a large molecule ADP ribose can be added to the amine group of lysine or glutamine The ending of DNA around histones in the nucleus is altered by the ADP -ribosylation of the histone proteins in cancer cells ADP ribosylation requires ADP and the target protein as the substrates in the ADP ribosylation ADP ribosylation of phosphoinositol is an important step in signaling through a G protein-coupled receptor pathway.
Which of the following statements is false about the structure of TRNA? O Because of hydrogen bonds, a tRNA actually twists and folds into a three- dimensional structure. O There are 4 base-paired regions and 3 loops in a tRNA molecule. O Flattened into one plane to reveal its base pairing, a tRNA molecule looks like a cloverleaf. O A TRNA molecule consists of a single RNA strand that is only about 80 nucleotides long. O A TRNA molecule carries an amino acid on its 5' end.
TRNAS are 'charged' or activated by aminoacyl TRNA synthetases. Select the correct statements regarding this process. The process is dependent on interactions between ribosomes and aminoacyl TRNA synthetases. The aminoacid is added to the D-loop of the tRNA. Aminoacyl TRNA synthetases are pre-associated with tRNAS. The amino acid is attached to the terminal to the 3' hydroxyl of an adenine in the acceptor arm. The process requires an aminoacyl-adenylate intermadiate. QUESTION 19 Select the correct statements regarding myosin-mediated contraction the sarcomere. O Ca2+ is required for the binding of myosin to f-actin. Myosin and f-actin are randomly distributed in the sarcomere. Physical pulling of the actin microfilament requires three distinct conformation changes on myosin that involve ATP binding, ATP hydrolysis and sequential release of inorganic phosphate and ADP. Myosin-mediated contracted is ubiquitous across all cell types. O O O O
The synthesis of a protein requires that the amino acids that constitute the growing polypeptide chain be covalently linked to the amino acid attached to the tRNA at the aminoacyl site of the ribosome. Which of the following catalyses this reaction? Options: the aminoacyl tRNA synthetase eEF2 eEF1-GTP a large ribosomal RNA the initiator tRNA met
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 a feature of tRNA that is important for its function in translation? O The codon that pairs with the mRNA Covalent, intramolecular bonds that confer secondary structure O The aminoacyl bond to an amino acid O Its ability to serve as an enzyme that catalyzes peptide bond formation
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 Oc. TRNA lacking an amino acid Od. aminoacyl tRNA
Which tRNA is about to be ejected from the "E" site of this ribosome? A tRNA for Pro tRNA for Ser tRNA for Glu tRNA for Met tRNA for Leu tRNA for Gly U A G Gly Gly A U Pro Met Glu Ser Leu A C Leu & G A U U A U
For each amino acid incorporated into a polypeptide the cell has to invest three high-energy phosphates (ATP or GTP). At which step of the overall process is energy investment NOT required? What is the correct answer from below? Ester bond formation between a tRNA and an amino acid Release of an aminoacyl-tRNA into the A-site of a ribosome Translocation of a ribosome along an mRNA molecule Peptide bond formation between amino acids none of the above
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 statements are true? Each stop codon also codes for an amino acid Each codon in mRNA codes for exactly one amino acid The start codon also codes for an amino acid Each TRNA will base pair with only one codon There are multiple codons possible for nearly all amino acids Each TRNA carries exactly one type of amino acid Each anticodon in tRNA pairs with exactly one codon Each codon in TRNA codes for exactly one amino acid