Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 12, Problem 32RE
REFLECT AND APPLY In prokaryotic protein synthesis, N-formylmethionine (fmet) is the first amino acid incorporated, whereas (normal) methionine is incorporated in eukaryotes. The same codon (AUG) serves both. What prevents methionine from being inserted into the beginning and N-formylmethionine in the interior?
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Chapter 12 Solutions
Biochemistry
Ch. 12 - RECALL Prepare a flow chart showing the stages of...Ch. 12 - Prob. 2RECh. 12 - RECALL Define degenerate code.Ch. 12 - RECALL How can the binding assay technique be used...Ch. 12 - RECALL Which nucleotides break the rules of...Ch. 12 - Prob. 6RECh. 12 - Prob. 7RECh. 12 - REFLECT AND APPLY It is possible for the codons...Ch. 12 - Prob. 9RECh. 12 - Prob. 10RE
Ch. 12 - REFLECT AND APPLY How would protein synthesis be...Ch. 12 - REFLECT AND APPLY Comment on the evolutionary...Ch. 12 - Prob. 13RECh. 12 - Prob. 14RECh. 12 - RECALL What is the role of ATP in amino acid...Ch. 12 - Prob. 16RECh. 12 - Prob. 17RECh. 12 - Prob. 18RECh. 12 - REFLECT AND APPLY A friend tells you that she is...Ch. 12 - Prob. 20RECh. 12 - REFLECT AND APPLY Is amino acid activation...Ch. 12 - Prob. 22RECh. 12 - Prob. 23RECh. 12 - Prob. 24RECh. 12 - RECALL What are the A site and the P site? How are...Ch. 12 - Prob. 26RECh. 12 - RECALL Describe the role of the stop signals in...Ch. 12 - Prob. 28RECh. 12 - RECALL What is the ShineDalgarno sequence? What...Ch. 12 - REFLECT AND APPLY You are studying with a friend...Ch. 12 - REFLECT AND APPLY E. coli has two tRNAs for...Ch. 12 - REFLECT AND APPLY In prokaryotic protein...Ch. 12 - REFLECT AND APPLY Describe the recognition process...Ch. 12 - REFLECT AND APPLY The fidelity of protein...Ch. 12 - REFLECT AND APPLY (a) How many activation cycles...Ch. 12 - REFLECT AND APPLY What is the energy cost per...Ch. 12 - Prob. 37RECh. 12 - Prob. 38RECh. 12 - Prob. 39RECh. 12 - Prob. 40RECh. 12 - Prob. 41RECh. 12 - Prob. 42RECh. 12 - Prob. 43RECh. 12 - Prob. 44RECh. 12 - Prob. 45RECh. 12 - Prob. 46RECh. 12 - Prob. 47RECh. 12 - RECALL What are two major similarities between...Ch. 12 - REFLECT AND APPLY Why do amino acids other than...Ch. 12 - REFLECT AND APPLY Would puromycin be useful for...Ch. 12 - Prob. 51RECh. 12 - Prob. 52RECh. 12 - Prob. 53RECh. 12 - Prob. 54RECh. 12 - Prob. 55RECh. 12 - Prob. 56RECh. 12 - REFLECT AND APPLY The amino acid hydroxyproline is...Ch. 12 - Prob. 58RECh. 12 - Prob. 59RECh. 12 - Prob. 60RECh. 12 - Prob. 61RECh. 12 - Prob. 62RECh. 12 - Prob. 63RECh. 12 - Prob. 64RECh. 12 - Prob. 65RECh. 12 - Prob. 66RECh. 12 - Prob. 67RECh. 12 - Prob. 68RECh. 12 - Prob. 69RECh. 12 - Prob. 70RECh. 12 - Prob. 71RECh. 12 - Prob. 72RECh. 12 - Prob. 73RE
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- REFLECT AND APPLY You are studying with a friend who says that the hydrogen-bonded portions of tRNA play no important role in its function. What is your reply?arrow_forwardREFLECT AND APPLY Explain why a 50S ribosomal subunit and a 30S ribosomal subunit combine to form a 70S subunit, instead of an 80S subunit.arrow_forwardREFLECT AND APPLY A sample of a peptide of unknown sequence was treated with trypsin; another sample of the same peptide was treated with chymotrypsin. The sequences (N-terminal to C-terminal) of the smaller peptides produced by trypsin digestion were as follows: MetValSerThrLysValIleTrpThrLeuMetIleLeuPheAsnGluSeArg The sequences of the smaller peptides produced by chymotrypsin digestion were as follows: AsnGluSerArgValIleTrpThrLeuMetIleMetValSerThrLysLeuPhe Deduce the sequence of the original peptide.arrow_forward
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- REFLECT AND APPLY A sample of an unknown peptide was divided into two aliquots. One aliquot was treated with trypsin; the other was treated with cyanogen bromide. Given the following sequences (N-terminal to C-terminal) of the resulting fragments, deduce the sequence of the original peptide. Trypsin treatment AsnThrTrpMetIleLysGlyTyrMetGlnPheValLeuGlyMetSerArg Cyanogen bromide treatment GlnPheValLeuGlyMetIleLysGlyTyrMetSerArgAsnThrTrpMetarrow_forwardREFLECT AND APPLY (a) How many activation cycles are needed for a protein with 150 amino acids? (b) How many initiation cycles are needed for a protein with 150 amino acids? (c) How many elongation cycles are needed for a protein with 150 amino acids? (d) How many termination cycles are needed for a protein with 150 amino acids?arrow_forwardREFLECT AND APPLY The amino acid hydroxyproline is found in collagen. There is no codon for hydroxyproline. Explain the occurrence of this amino acid in a common protein.arrow_forward
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