Concept explainers
(a)
Interpretation: The interaction present in phenylalanine and leucine has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.
(b)
Interpretation: The interaction present in arginine and aspartic acid has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.
(c)
Interpretation: The interaction present in two cysteine units has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.
(d)
Interpretation: The interaction present in serine and tyrosine has to be stated.
Concept introduction: The four types of attractive forces that give rise to tertiary proteins are: covalent disulphide bonds, electrostatic attractions, hydrogen bonds and hydrophobic attractions.

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Chapter 20 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Q5: Label each chiral carbon in the following molecules as R or S. Make sure the stereocenter to which each of your R/S assignments belong is perfectly clear to the grader. (8pts) R OCH 3 CI H S 2pts for each R/S HO R H !!! I OH CI HN CI R Harrow_forwardCalculate the proton and carbon chemical shifts for this structurearrow_forwardA. B. b. Now consider the two bicyclic molecules A. and B. Note that A. is a dianion and B. is a neutral molecule. One of these molecules is a highly reactive compound first characterized in frozen noble gas matrices, that self-reacts rapidly at temperatures above liquid nitrogen temperature. The other compound was isolated at room temperature in the early 1960s, and is a stable ligand used in organometallic chemistry. Which molecule is the more stable molecule, and why?arrow_forward
- A mixture of C7H12O2, C9H9OCl, biphenyl and acetone was put together in a gas chromatography tube. Please decide from the GC resutls which correspond to the peak for C7,C9 and biphenyl and explain the reasoning based on GC results. Eliminate unnecessary peaks from Gas Chromatography results.arrow_forwardIs the molecule chiral, meso, or achiral? CI .CH3 H₂C CIarrow_forwardPLEASE HELP ! URGENT!arrow_forward
- Identify priority of the substituents: CH3arrow_forwardHow many chiral carbons are in the molecule? OH F CI Brarrow_forwardA mixture of three compounds Phen-A, Acet-B and Rin-C was analyzed using TLC with 1:9 ethanol: hexane as the mobile phase. The TLC plate showed three spots of R, 0.1 and 0.2 and 0.3. Which of the three compounds (Phen-A; Acet-B or Rin-C) would have the highest (Blank 1), middle (Blank 2) and lowest (Blank 3) spot respectively? 0 CH: 0 CH, 0 H.C OH H.CN OH Acet-B Rin-C phen-A A A <arrow_forward
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