2. Classify the following amino acids as nonpolar, polar basic, polar acidic, or polar neutral.(a)(b)(c)(d)H2N-CH-C-OH2N CH-C OHH2N-CH-C-OHH,N--CH-C-OHCH2CH-OHCH2CH,C=0CH3CH-CH3OHCH3229OH

Amino acids are the molecules that contain both amino and carboxylic acid groups. In living systems,…

Answered: Classify the following amino acids as…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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The amino acid arginine ionizes according to the following scheme: NH, NH2 NH2 H NH, C=N C=N C=N C=N-H pk = 2.17 -H pK. = 8.99 -H pK = 125 -H* H. NH NH NH NH H (CH,)a H (CH), +H* (CH)a (CH,)a H,N-C-coo- +H* +H* H-N*-C-COOH H-N-C-Co- H,N-C-co- H. нн H. H II II IV (a) Calculate the isoelectric point of arginine. You can neglect contributions from form I. Why? (b) Calculate the average charge on arginine when pH = 9.20. (Hìnt: Find the average charge for each ionizable group and sum these together.) (c) Is the value of average charge you calculated in part b reasonable, given the pl you calculated in part a? Explain your answer.
How many chiral carbons are present in this amino acid (aqueous form)? (Identify the following amino acid (at pH = 7.0): (COO-)–CH(NH3+)–CH2–CH2–CH2–CH2–(NH3+)) zero chiral carbons one chiral carbon two chiral carbons three chiral carbons four chiral carbons
g) (CH3)₂ - CH₂ -CH-COOH + CH₂-CH-COOH -H₂O NH₂ OH NH₂ 4. Write the equation for the digestion (hydrolysis) of Phe-Asp-Ala. €
The R group of aspartic acid is -CH2COOH. What will the structure of the amino acid be at a very high pH (above all its pKa values)? H2N- CH- -C OH H3N- -CH- -С— он H2N- -CH CH2 CH2 A) B) C) D) H3C- ÓH ÓH
Draw the following Lipids in: A) Condensed (detailed) Structure, B) its Block Diagram.C) Show/Indicate the type of linkages per structure (put an arrow). 4) Sphingolipid/Sphingophospholipid (use sphingosine, myristic acid, phosphate, and choline for amino alcohol);
-s/67365/take The image below shows the structure of a lipid. Which of the following statement is correct about the lipid shown in the image Stearic acid ННННННННННННННННН .................. Н-С-О-c-c-c-с-с-с-с-с-с-с-с-с-с-с-с-с-с-с-н Н Carboxylic acid group 10 glycerol ................. ННННННННННННННННН Онн .... H-C-0-c-c-c-c-c-c-c=С-С-С=С-С-С-С-С-С-c-С-Н ................ НННННННННННННННН НННННН | | | | | ОННННН ...... ns://canvas uts edu au/accoccmont Н-С-О-c-c-c-c-c-c-c=c-c-c=c-c-c-c-c-c-c-c-н |--1.... ... ... ... НННННННННННННННН hrefr | Н 5.000 (1 ННННННН |||||| Linoleic acid
61. The correct name of the peptide below is, * H2N- -CH-C-N- -CH-C- -CH-C -N-CH-C- -OH H ČH3 CH-CH3 CH2 ČH3 a) Gly-Leu-lle-Thr b) Ser-Val-Ala-Gly c) Gly-Ala-Val-Ser d) Thr-lle-Lue-Gly
1. (a) Arrange the following lipid molecules in the order of their relative melting points. Н.С — о-С-R Н.С — о-С-R H,C -0-ć- | НС —0—С-R НС —о-с-R' НС —о-с-R" H2C -0-Ċ-R H2C -0-C-R H2C -0-ċ-R" VI VII VIII (-olx). 0-ċ-R 180 —о-с-R 18-1 cisÃ9 -ċ-R") = 18:1transA9 (b) Give your reasons for your answer. (c) On heating lipid VI with aqueous NAOH, all the ester linkages were hydrolyzed. Draw the structure of each product of the hydrolysis. (e) Giving a reason for your answer, predict what would happen to the solubility of these products in water if, after the hydrolysis, excess acid was added to the medium to acidify it.
Draw the following Lipids in: A) Condensed (detailed) Structure, B) its Block Diagram. C) Show/Indicate the type of linkages per structure (put an arrow). 5) Glycosphingolipid/Sphingoglycolipid (use sphingosine, stearic acid, and D-galactose);
Draw the following Lipids in: A) Condensed (detailed) Structure, B) its Block Diagram.C) Show/Indicate the type of linkages per structure (put an arrow). 2) Triacylglycerol (use glycerol, 3 fatty acids consisting of stearic acid, palmitic acid, and linolenic acid);
7. Draw and give the full names of the amino acids in the following dipeptides. ČHS HN- OH CH, CH- OH CH2
(i) Identify the type of sphingolipids A and B in Figure 2. CHS A CH3 в Figure 2 (ii) What structural similarities are shared by sphingolipids and proteins? (iii) Why are sphingolipids abundant in cell membrane?

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Classify the following amino acids as nonpolar, polar basic, polar acidic, or polar neutral. (a) (b) (c) (d) H2N-CH-C-OH H,N CH-C-OH H2N-CH-C-OH H2N-CH-C-OH CH2 CH-OH CH2 CH2 C=0 CH-CH3 CH3 OH CH3 229 OH