Concept explainers
(a)
Interpretation:
Difference in
Concept introduction:
Secondary structure is a regular pattern of
Tropocallogen is a quaternary structure of collagen and is a fibrous protein.
(b)
Interpretation:
Difference in
Concept introduction:
Secondary structure is a regular pattern of
Tropocallogen is a quaternary structure of collagen and is a fibrous protein.
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Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
- A common structural feature of membrane lipids is their amphipathic nature. For example, in phosphatidylcholine, the two fatty acid chains are hydrophobic and the phosphocholine head group is hydrophilic. For each of the following membrane lipids, name the components that are hydrophilic and hydrophobic.. a)phosphatidylethanolamine b) sphingomyelin c) galactosylcerebroside d) ganglioside e) cholesterolarrow_forwardDraw 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);arrow_forwardDraw 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);arrow_forward
- One or more of the compounds shown below will satisfy each of the following statements. Not all compounds may be used; some may be used twice. Put the number(s) in the blank. (1) Found in chitin. (2) An L-saccharide. (3) The first residue attached to asparagine in N-linked glycans. (4) A uronic acid. (5) A ketose. CH,OH CoO COO OH H H H H ОН Н но OH OH H OH H HO OH H NHC- CH, Oso, OH (a) (b) (c) CH,OH CH,OH CH,OH C=0 CHOH C=0 H-C- OH CH,OH но -с-н ČH,OH CH,OH (d) (e)arrow_forwardThe melting points of a series of 18-carbon fatty acids are: stearic acid, 69.6 °C; oleic acid, 13.4 °C; linoleic acid, −5 °C; and linolenic acid, −11 °C.(a) What structural aspect of these 18-carbon fatty acids can be correlated with the melting point?(b) Draw all the possible triacylglycerols that can be constructed from glycerol, palmitic acid, and oleic acid. Rank them in order of increasing melting point.(c) Branched-chain fatty acids are found in some bacterial membrane lipids. Would their presence increase or decrease the fluidity of the membrane (that is, give the lipids a lower or higher melting point)? Why?arrow_forwardGlycoproteins: a) Briefly describe the structure and function of EPO. Provide its full name b) What are lectins?arrow_forward
- 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). 3) Glycerophospholipid (use glycerol, 2 stearic acid, phosphate, and serine for its amino alcohol)arrow_forwardDraw the following Lipids in A) Condensed (detailed) Structure, B) its Block Diagram.C) Show/Indicate the type of linkages per structure (put an arrow) 1) Triacylglycerol (use glycerol, 3 fatty acids consisting of stearic acid, palmitic acid, and linolenic acid);2) Glycerophospholipid (use glycerol, 2 stearic acid, phosphate, and serine for its amino alcohol);3) Sphingolipid/Sphingophospholipid (use sphingosine, myristic acid, phosphate, and choline for amino alcohol); 4) Glycosphingolipid/Sphingoglycolipid (use sphingosine, stearic acid, and D-galactose); 5) Cholesterol ( use steroid fused ring system with -OH group at C3, double bond at C5, 2 methyl group at C10 & C13, and an 8-Carbon branched side chain at C17)arrow_forwardThe isoelectric point of an amino acid is the point where; O a) the amino acid carries no net electrical charge b) the a-carboxylic acid is protonated and the a-amino group is unprotonated c) ) the pKa of the a-carboxylic acid is the same as the pK, of the a-amino group a d) the solubility of the amino acid is maximized e) the a-carboxylic acid and the a-amino group are both half protonated MacBo 80 000 esc F1 F2 F3 F4arrow_forward
- In the peptide Ala – Gly – Val – Phe – Tyr, a carboxylate (-COO-) group would bound in which amino acid? A) Gly b) Ala c) Phe d) Tyr Which amino acid forms disulfide bonds? A) Met b) Cys c) Arg d) Pro The sequence Gly-Pro-Pro is often found in collagen. This would be a description of: a) primary structure b) secondary structure c) tertiary structure d) quaternary structurearrow_forwardWhich of the following is true A) The disulfide bridges formed by reduction of the sulfhydryl groups on cysteine destabilizes protein tertiary structure. B) The disulfide bridges formed by oxidation of the sulfhydryl groups on cysteine destabilizes protein tertiary structure. C) The disulfide bridges formed by oxidation of the sulfhydryl groups on cysteine stabilizes protein tertiary structure. D) The disulfide bridges formed by reduction of the sulfhydryl groups on cysteine stabilizes protein tertiary structure.arrow_forwardWhat peptides are expected to be produced when α-melanotropin is cleaved by (a) trypsin, (b) cyanogen bromide, or (c) thermolysin? (as shown)arrow_forward
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