Which of the following amino acids has a negatively charged atom in its side chain at pH 7.2? a. V b. H c. N d. K e. none.
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- The net charge of the dipeptide GD at pH 8.0 is: (pKa ‘s amino terminal is 10, pKa carboxy terminal is 2, pKa side chain of D is 4.00): a. -1 b. 0 c. +2 d. +1 e. -2HO molecule E HO. (CH12 CH, OH NH, HO molecule F HO molecule D molecule C H,C-(CH),3 of H,C-(CH,) H,C-(CH molecule B H3C-(CHa)12 H,C-(CH) но molecule AThe side chain of which of the following amino acids is most hydrophilic a. Phe b. Val c. Leu d. Cys e. Ala
- Which of the following amino acid side chains CANNOT form hydrogen bond? O a. O b. C. Gln Tyr Pro d. Asn O Oe. Throf the following is incorrect about the sphingolipids? a. The backbone is sphingosine which has an amine group to which a fatty acid can be attac ▸ b. The sphingophospholipids have a phosphate group with an alcohol attached c. They are components of membranes Od. The cerebrosides have oligosaccharides as head groupsWhich of the following is NOT true of a common fatty acid represented by all cis-20:5 A5? A. The fatty acid is a u-shaped molecule B. The fatty acid contains 20 carbons C. The fatty acid is unsaturated D. The lipid is an essential fatty acid for infants The molecule is an w-6 fatty acid
- A mixed triglyceride contains: O A. three similar fatty acids esterified with glycerol B. two similar fatty acids esterified with glycerol O C. three different fatty acids esterified with glycerol all of the above 35Fatty acids Yield about: A. 7 ATP per C at B. 120 ATP per C atom C. 32 AIP C atom D. 14 ATP per C atom1. The figure below shows the Fischer projection of an L-aldohexose. T or F O. НО H- Но H- Но- ČH2OH Naturally occurring saturated long-chain fatty acids are usually in trans- configuration. 2. T or F 3. N-acetylglucosamine is commonly found in glycosaminoglycans. T or F 4. The isoelectric point of isoleucine is lower than that of histidine. T or F 5.. At pH 7, all amino acids stop migrating in isoelectric focusing. T or F 6. The following amino acid is a L-valine. T or F СООН H-NH2 CH-CH3 CH3 7. Salting out is a process to remove salts from proteins. T or F 8. There are five carbons in a pyranose ring. T or F 9. Hydrophobic interaction can be found in protein and DNA. T or F RNA is a polymer consisting of nucleosides joined together by phosphodiester bonds. 10. T or F 11. There are 3.6 base pairs in one turn of DNA helix. T or F
- 15. Rank the solubility of the following fatty acids in water. A. C<E<B<D<F<A B. A<F<D<B<E<C C. C<E<B<F<D<A D. A<D<F<B<E<C 16. Using the same information in no. 15, rank the solubility of the fatty acids in hexane.* A. C<E<B<D<F<A B. A<F<D<B<E<C C. C<E<B<F<D<A D. A<D<F<B<E<CDenaturation of protein is a result of O A. cleavage of the peptide bond O B. formation of H-bond O c. breaking of H-bond D. none of these 17Rank the following fatty acids from lowest melting temperature to highest melting temperature. A -0-c B-0-c -0-2 D-0-84 OBSEE MORE QUESTIONS
