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| October 22, 2018

CHAPTER 14 PROTEINS1. How is the tripeptide shown designated?a. Ala-Cys-Aspb. Ala-Cys-Gluc. Asp-Cys-Alad. Glu-Cys-Ala2. How is the tripeptide designated?a. Ala-Cys-Aspb. Ala-Cys-Gluc. Asp-Cys-Alad. Glu-Cys-Ala3. Which of the following is glycylalanine?a.c.b.d.4. When will a protein have a net positive charge?a.b.c.d.alwaysneverwhen the pH is above its isoelectric pointwhen the pH is below its isoelectric point5. When will a protein have a net negative charge?a. alwaysb. neverc. when the pH is above its isoelectric pointd. when the pH is below its isoelectric point6. When will a protein have the lowest solubility?a. when the pH is very lowb. when the pH = 7c. when the pH is very highd. at its isoelectric point7. Which of the following is true of proteins?a.b.c.d.All proteins are acidic.All proteins are basic.All proteins are neutral.The acid/base properties of a protein depend on the identity of its side chains.8. Which of the following defines the primary structure of proteins?a.b.c.d.the geometric arrangement of the backbone atomsthe geometric arrangement of the side chainsthe sequence of the amino acidsall of the above9. How many dipeptides can be made using the 20 standard amino acids?a. 20b. 40c. 200d. 40010. Consider the following image.What type of interaction is depicted by the dashed line?a. hydrogen bondingb. covalent bondingc. hydrophobic interactionsd. salt bridgesCHAPTER 12 CARBOHYDRATES1. For the solvents water, ethanol, and benzene which gives the correct order of solubility ofmonosaccharides?a. benzene > ethanol > waterb. benzene > water > ethanolc. water > ethanol > benzened. water > benzene > ethanol2. The cyclic structures of monosaccharides are which of the following?a. acetalsb. hemiacetalsc. ethersd. esters3. The reaction of monosaccharides to form a disaccharide is an example of which of the followingreactions?a. condensationb. hydrolysisc. reductiond. oxidation4. Complete hydrolysis of which of the following disaccharides yields a single monosaccharide?a. lactoseb. maltosec. sucrosed. none of these5. Which of the following is obtained as a result of the complete hydrolysis of starch?a. D-glucoseb. lactosec. maltosed. sucrose6. Glycogen is structurally similar to which of the following?a. amylopectinb. amylosec. cellulosed. none of these7. Examine the following structures.ABWhich substance would be classified as an aldopentose?a. Ab. Bc. Cd. DCDCD8. Examine the following structures.ABWhich substance would be classified as an ketohexose?a. Ab. Bc. Cd. D9. Examine the following structures.ABWhich substance would be classified as an aldohexose?a. Ab. Bc. Cd. DCDCD10. Examine the following structures.ABWhich substance has an L-configuration?a. Ab. Bc. Cd. DCHAPTER 13 LIPIDS1. Which of the following is true of most fatty acids found in triglycerides?a.b.c.d.They are unbranched.They contain more than 20 carbon atoms.They contain an odd number of carbon atoms.none of the above2. Which of the following type of reaction is involved in saponification?a. condensationb. dehydrationc. hydrogenationd. hydrolysis3. Which of the following is a reactant in a saponification reaction?a. a strong acidb. a weak acidc. a strong based. a weak base4. How many rings are associated with the steroid structure?a. 3b. 4c. 5d. 65. Which of the following structural arrangements is the steroid structure?a.c.b.d.6. Consider the following structure.Which of the following is a correct classification for this substance?a. fatty acidb. glycerolc. triglycerided. diester7. Which number in the diagram represents the glycerol backbone of this structure?a.b.c.d.12358. Which number in the diagram represents an ester linkage?a.b.c.d.12349. Which number in the diagram represents an unsaturated fatty acid?a.b.c.d.123410. Fatty acids contain:a. amine groupsb. amide groupsc. carboxylic acid groupsd. anhydride groupsCHAPTER 14 PROTEINS1. How is the tripeptide shown designated?a. Ala-Cys-Aspb. Ala-Cys-Gluc. Asp-Cys-Alad. Glu-Cys-Ala2. How is the tripeptide designated?a. Ala-Cys-Aspb. Ala-Cys-Gluc. Asp-Cys-Alad. Glu-Cys-Ala3. Which of the following is glycylalanine?a.c.b.d.4. When will a protein have a net positive charge?a.b.c.d.alwaysneverwhen the pH is above its isoelectric pointwhen the pH is below its isoelectric point5. When will a protein have a net negative charge?a. alwaysb. neverc. when the pH is above its isoelectric pointd. when the pH is below its isoelectric point6. When will a protein have the lowest solubility?a. when the pH is very lowb. when the pH = 7c. when the pH is very highd. at its isoelectric point7. Which of the following is true of proteins?a.b.c.d.All proteins are acidic.All proteins are basic.All proteins are neutral.The acid/base properties of a protein depend on the identity of its side chains.8. Which of the following defines the primary structure of proteins?a.b.c.d.the geometric arrangement of the backbone atomsthe geometric arrangement of the side chainsthe sequence of the amino acidsall of the above9. How many dipeptides can be made using the 20 standard amino acids?a. 20b. 40c. 200d. 40010. Consider the following image.What type of interaction is depicted by the dashed line?a. hydrogen bondingb. covalent bondingc. hydrophobic interactionsd. salt bridges

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