What is an aminoacyl tRNA synthetase? How does it attach amino acids? How is it specific?
What is an aminoacyl tRNA synthetase? How does it attach amino acids? How is it specific?
Homework Answers
aminoacyl synthetase is the enzyme which carries the reaction the binding of aminoacid to the tRNA. the tRNA which have aminoacid known as Charged tRNA other wise called aminoacyl tRNA..the process occurs in two steps. in the first step the aminoacyl-AMP is formed from the reaction between aminoacid and ATP and in next step this aminoacyl-AMP reacts with Adenine present on the 3' postion and covalently bound to the 3' CCA of tRNA forms aminoacyl tRNA. aminoacyl tRNA is specific it binds to the aminoacid which is complementary to the sequence of Codon on the mRNA.
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What is an aminoacyl tRNA synthetase? How does it attach amino
acids? How is it specific?
12. If an aminoacyl-tRNA synthetase attaches the wrong amino acid to a tRNA, what will happen?...
12. If an aminoacyl-tRNA synthetase attaches the wrong amino acid to a tRNA, what will happen? O The tRNA won't fold into the correct secondary structure. O The tRNA will be rejected by the ribosome. O The wrong amino acid will be added to the polypeptide, but it will be removed during proofreading. O The wrong amino acid will be added to the polypeptide.
Complete the following reactions: 1. Amino acid-ERNA coupling on the aminoacyl-tRNA synthetase Step 1: Adenosine 0...
Complete the following reactions: 1. Amino acid-ERNA coupling on the aminoacyl-tRNA synthetase Step 1: Adenosine 0 0 0-P-O-P-O-P-0 0 0 0 B RNA synthetase side-product Step 2: "organic product "organic product tRNA Adenosine 6-- 0 0 TANA synthetase HOH OH side-product 2. Peptide coupling on the ribosome: OH. CO н со ribosome HEC tRNA RNA A-Site
explain how an alanine tRNA synthetase might prevent the incorrect addition of the similar amino acids...
explain how an alanine tRNA synthetase might prevent the incorrect addition of the similar amino acids glycine and valine to its target tRNA aline could fit in the activation site. - A. B. Alanine could fit in the activation site. - A. B. Glycine could fit in the activation site. - A. B. Valine could fit in the editing...
Which of the following statements about aminoacyl tRNA synthetases is NOT true? There are at least...
Which of the following statements about aminoacyl tRNA synthetases is NOT true? There are at least as many aminoacyl tRNA synthetases as there are mRNAs. They participate in the “charging” of all of the tRNAs. They support the specificity of protein-nucleic acid interactions. There are at least as many aminoacyl tRNA synthetases as there are amino acids.
Part A Which of the following statements is NOT true of aminoacyl-tRNA synthetases? They activate the...
Part A Which of the following statements is NOT true of aminoacyl-tRNA synthetases? They activate the amino acid and covalently bond it to the mature tRNA. They attach the amino acid to the CCA at the 3'-end of the mature tRNA. They attach the amino acid to the elongating peptide and catalyze translocation. Each member of this protein family is dedicated to one particular amino acid. They are primarily responsible for the accuracy of mRNA translation Submit Request Answer Provide...
How is the correct amino acid bound to its appropriate tRNA molecule? ANSWER A IS WRONG...
How is the correct amino acid bound to its appropriate tRNA molecule? ANSWER A IS WRONG A. they are bound by the enzyme amino acyl tRNA synthetase in the nucleus B. they are bound by the enzyme amino acyl tRNA synthetase in the cytoplasm C. they are linked during modification in the rough ER D. they are connected by RNA polymerase in the nucleus
7. In bacteria the elongation stage of protein synthesis does not involve: A) aminoacyl-tRNAS B) EF-Tu...
7. In bacteria the elongation stage of protein synthesis does not involve: A) aminoacyl-tRNAS B) EF-Tu C) GTP D) IF-2 E) peptidyl transferase Which of the following best describes the cholesterol molecule? A) Amphipathic B) Nonpolar, charged C) Nonpolar, uncharged D) Polar, charged E) Polar, uncharged The enzyme that attaches an amino acid to a tRNA (aminoacyl-tRNA synthetase): A) always recognizes only one specific tRNA. B) attaches a specific amino acid to any available tRNA species. C) attaches the amino...
Which of the following amino acids is NOT an inhibitor of glutamine synthetase? O Glycine Alanine...
Which of the following amino acids is NOT an inhibitor of glutamine synthetase? O Glycine Alanine O Proline O Serine
Which one of the following is true? a. tRNA synthetase loads the correct amino acid on...
Which one of the following is true? a. tRNA synthetase loads the correct amino acid on tRNA b. Ribosomes read RNA in the 5'+3' direction during protein synthesis c. STOP codons are degenerate d. DNA transcription produces mRNA in bacteria e. a, b, d f. a, d g. None of the above h. All of the above Which of the following destabilizes the tertiary structure of proteins? a. Hydrophobic (nonpolar) interactions b. Dipole moments between parallel alpha helices c. Van...
There are 20 different tRNA molecules, one for each of the 20 amino acids found in protein
There are 20 different tRNA molecules, one for each of the 20 amino acids found in protein. During protein synthesis, the job of a tRNA molecule is to carry its particular amino acid to the growing protein chain and find the correct amino acid position there. It does this by matching a 3- letter anticodon on the tRNA to a complementary 3-letter codon on mRNA. Below, in a diagram of a ERNA molecule, nucleotides are represented by small circles, some...
12. If an aminoacyl-tRNA synthetase attaches the wrong amino acid to a tRNA, what will happen? O The tRNA won't fold into the correct secondary structure. O The tRNA will be rejected by the ribosome. O The wrong amino acid will be added to the polypeptide, but it will be removed during proofreading. O The wrong amino acid will be added to the polypeptide.
Complete the following reactions: 1. Amino acid-ERNA coupling on the aminoacyl-tRNA synthetase Step 1: Adenosine 0 0 0-P-O-P-O-P-0 0 0 0 B RNA synthetase side-product Step 2: "organic product "organic product tRNA Adenosine 6-- 0 0 TANA synthetase HOH OH side-product 2. Peptide coupling on the ribosome: OH. CO н со ribosome HEC tRNA RNA A-Site
Part A Which of the following statements is NOT true of aminoacyl-tRNA synthetases? They activate the amino acid and covalently bond it to the mature tRNA. They attach the amino acid to the CCA at the 3'-end of the mature tRNA. They attach the amino acid to the elongating peptide and catalyze translocation. Each member of this protein family is dedicated to one particular amino acid. They are primarily responsible for the accuracy of mRNA translation Submit Request Answer Provide...
7. In bacteria the elongation stage of protein synthesis does not involve: A) aminoacyl-tRNAS B) EF-Tu C) GTP D) IF-2 E) peptidyl transferase Which of the following best describes the cholesterol molecule? A) Amphipathic B) Nonpolar, charged C) Nonpolar, uncharged D) Polar, charged E) Polar, uncharged The enzyme that attaches an amino acid to a tRNA (aminoacyl-tRNA synthetase): A) always recognizes only one specific tRNA. B) attaches a specific amino acid to any available tRNA species. C) attaches the amino...
Which of the following amino acids is NOT an inhibitor of glutamine synthetase? O Glycine Alanine O Proline O Serine
Which one of the following is true? a. tRNA synthetase loads the correct amino acid on tRNA b. Ribosomes read RNA in the 5'+3' direction during protein synthesis c. STOP codons are degenerate d. DNA transcription produces mRNA in bacteria e. a, b, d f. a, d g. None of the above h. All of the above Which of the following destabilizes the tertiary structure of proteins? a. Hydrophobic (nonpolar) interactions b. Dipole moments between parallel alpha helices c. Van...
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