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MCAT Organic Chemistry 2

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Unique feature of cysteine






2. 1.has partial double bond character due to resonance 2. it cannot rotate 3. amide H is someWhat acidic and can H bond






3. Hydrophobic and hydrophilic interactions btw amino acids more distant from each other on the polypeptide chain






4. The amino acid sequence of a protein that is determined by peptide bond






5. Initial folding of proteins into shapes stabilized by H bonds btw amino and carboxyl groups of backbone






6. 1. it exists in solution in equilibrium with linear form 2. mutarotation occurs readily 3. it is a reducing sugar - and reacts positively w/ Benedict's reagent






7. Structure where H bonds occur btw residues distant from each other - or on a separate chain. backbone is extended rather than coiled






8. Unique feature of proline






9. Sugar with an aldehyde at the first carbon position






10. Property of fatty acids where one end is hydrophobic and the other is hydrophilic






11. 3 carbon triol that forms backbone of triacylglycerol






12. Acetic acid formula?






13. Basic amino acids






14. Glycosidic linkage of maltose






15. Histidine






16. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






17. Hydrolysis






18. Energy storage molecule of carbohydrates for plants






19. Fatty acid w/ no double bonds and maximum number of hydrogens






20. Adjacent polypeptide strands running in the same direction in Beta pleated sheet structure






21. Characteristics of hydrophobic amino acids






22. What kind of lipids compromise the lipid bilayer?






23. Interaction btw polypeptide subunits arranged in polypeptide. can be covalent bonds or intermolecular forces - disulfide bond that does not form btw residues on the same protein affect (blank)






24. Enzymes that hydrolyze fats






25. 3 physiological roles of lipids






26. Acidic amino acids






27. Enzyme that hydrolyzes lactose into galactose and glucose into






28. (+) and (-) describe what?






29. Macromolecule that performs a variety of bodily functions and is composed of up to 20 different amino acids






30. Fatty acid w/ one or more double bonds in cis form predominately






31. Carbon that in linear form has a carbonyl - or in cyclic form has a hemiacetal or an acetal






32. 1. it requires an enzyme to linearize and mutarotate 2. it is not a reducing sugar and give negative Benedict's test






33. D and L describe what?






34. Glycosidic linkage of cellulose






35. Molecules with the same atoms - but different bonds






36. Interconversion btw two anomers






37. Naturally occurring carbohydrates are formed from what?






38. Name for 6 membered ring






39. PH at which the amino acid has a net neutral charge






40. Sugar with a carbonyl group at the 2 carbon position






41. Right handed helix w/ carboxyl of one amino acid bound to the amine of another amino acid three residues away - proline never resides in this structure b/c it would place a kink in the helix






42. Energy storage molecule of carbohydrates for animals






43. (R) and (S) describe what?






44. Generated btw either thiols on different proteins or thiols on the same protein






45. Polar amino acids






46. What stabilizes lipid bilayer?






47. Glycosidic linkage of sucrose






48. Amino group placed on the left of a fischer projection is a?






49. What configuration do all naturally occuring amino acids have?






50. Glycosidic linkage of lactose







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