Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Question
Chapter 1, Problem 4RQ
Summary Introduction
To review:
Definition of the following biological terminologies:
(a) polypeptide
(b) peptide
(c) protein
(d) peptide bond
(e) standard amino acids
Introduction:
Amino acids are classified as the organic compounds that have two
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Question 25
Calculate the net charges of the following peptides at pH 7.4. Indicate which amino acids bear chuarged side chans
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b) NH2-GIn-Glu-Lys-Tyr-Trp-Arg-Ala-Leu-COOH
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Chapter 1 Solutions
Biochemistry: The Molecular Basis of Life
Ch. 1 - Prob. 1RQCh. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Prob. 5RQCh. 1 - Prob. 6RQCh. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - Prob. 9RQCh. 1 - Prob. 10RQ
Ch. 1 - Prob. 11RQCh. 1 - Prob. 12RQCh. 1 - Prob. 13RQCh. 1 - Prob. 14RQCh. 1 - Prob. 15RQCh. 1 - Prob. 16RQCh. 1 - Prob. 17RQCh. 1 - Prob. 18RQCh. 1 - Prob. 19RQCh. 1 - Prob. 20RQCh. 1 - Prob. 21RQCh. 1 - Prob. 22RQCh. 1 - Prob. 23RQCh. 1 - Prob. 24RQCh. 1 - Prob. 25RQCh. 1 - Prob. 26RQCh. 1 - Prob. 27RQCh. 1 - Prob. 28RQCh. 1 - Prob. 29RQCh. 1 - Prob. 30RQCh. 1 - Prob. 31RQCh. 1 - Prob. 32RQCh. 1 - Prob. 33RQCh. 1 - Prob. 34RQCh. 1 - Prob. 35RQCh. 1 - Prob. 36RQCh. 1 - Prob. 37RQCh. 1 - Prob. 38RQCh. 1 - Prob. 39RQCh. 1 - Prob. 40RQCh. 1 - Prob. 41RQCh. 1 - Prob. 42RQCh. 1 - Prob. 43RQCh. 1 - Prob. 44RQCh. 1 - Prob. 45RQCh. 1 - Prob. 46RQCh. 1 - Prob. 47RQCh. 1 - Prob. 48FBCh. 1 - Prob. 49FBCh. 1 - Prob. 50FBCh. 1 - Prob. 51FBCh. 1 - Prob. 52FBCh. 1 - Prob. 53FBCh. 1 - Prob. 54FBCh. 1 - Prob. 55FBCh. 1 - Prob. 56FBCh. 1 - Prob. 57FBCh. 1 - Prob. 58SACh. 1 - Prob. 59SACh. 1 - Prob. 60SACh. 1 - Prob. 61SACh. 1 - Prob. 62SACh. 1 - Prob. 63TQCh. 1 - Prob. 64TQCh. 1 - Prob. 65TQCh. 1 - Prob. 66TQCh. 1 - Prob. 67TQCh. 1 - Prob. 68TQCh. 1 - Prob. 69TQCh. 1 - Prob. 70TQCh. 1 - Prob. 71TQCh. 1 - Prob. 72TQCh. 1 - Prob. 73TQ
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- The _____________ is an explanation for why there are fewer tRNAs than expected in living cells.arrow_forwardWhen a purine or pyrimidine is linked through a b-Nglycosidic link to C-1 of a pentose, the molecule is calleda _________________________.arrow_forwardWhen a purine or a pyrimidine is linked through a β-N-glycosidic link to C-1 of a pentose, the molecule is called a _____________ .arrow_forward
- Question 18 There is energy requirement for every amino acid added in a growing polypeptide chain. A) True B) Falsearrow_forwardQuestion 4. Imagine the main chain of a protein bends back on itself so that two amino acid residues R1 and R2 come close to each other. In the table below are four possibilities for what R1 and R2 might be. In each case, decide whether a specific interaction could form between the residues. If a specific interaction could form, give the name of the interaction. R₁ cysteine tyrosine threonine arginine R₂ cysteine phenylalanine glutamine aspartate specific interaction? OO yes O yes O no no OO O yes no yes no name of specific interaction 0 П 0 0arrow_forwardQuestion 11. // Hint: Isoelectric focusing separates proteins based on their pI values, and can separate proteins that only differ by a net charge of ±1.±1. Recall that an amino acid residue with a negatively charged R group has a relatively low isoelectric point (pI) where it has zero net charge. Likewise, an amino acid residue with a positively charged R group has a relatively high isoelectric point (pI) where it has zero net charge. Order from Low pH to High pHarrow_forward
- Question 13 Classify the following polysaccharides Chitin A. Heteroploysaccharide Cellulose B. Homopolysaccharide Peptidoglycan v Glycogen Glycosaminoglycanarrow_forwardThe figure below shows the titration curve for the amino acid aspartic acid. There are five key points in the titration designated with roman numerals. For each of the statements following the figure, identify the appropriate key point of the titrationarrow_forwardSuggest a reason (or reasons) why amino acids polymerize to form proteins that have comparatively few covalent crosslinks in the polypeptide chain.arrow_forward
- This is the three-letter code for the amino acid that is the most geometrically constricted amino acid within a peptide sequence.arrow_forwardQuestion 18 Match the following structural composition with the corresponding polysaccharide Linear homoglycan of glucose connected by a1-4 linkages a. agarose v Branched glycan formed by alternating units of D-galactose and L-galactose b. amylose v Linear sulfated chains of alternating B-D-galactopyranose and 3,6-anhydro- a-galactopyranosyl units c. amylopectin v Poly-B-Dmannopyranosyluronic acid and/or Poly-a-L-gulopyranosyluronic acid d. Alginate v Repeating Poly-D-galacturonic acid residues e. agaropectin deacetylated straight-chain amino-polysaccharide polymer linked in a B(1-4) type of linkage f. Pectin g. carrageenan h. chitosanarrow_forwardThymine is a nitrogenous base or nucleosides?arrow_forward
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