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MCAT Organic Chemistry 2

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • 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. Structure where H bonds occur btw residues distant from each other - or on a separate chain. backbone is extended rather than coiled






2. Enzyme that hydrolyzes lactose into galactose and glucose into






3. Unique feature of proline






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






5. What kind of lipids compromise the lipid bilayer?






6. Name for 5 membered ring






7. Fxn of cholesterol in the membrane?






8. Naturally occurring carbohydrates are formed from what?






9. Characteristics of polar amino acids






10. Energy storage molecule of carbohydrates for animals






11. Physiological pH






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






13. What describes the affinity of functional groups for a proton?






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






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






16. Amino group placed on the right of a fischer projection is a?






17. 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






18. Sulfur containing amino acids






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






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






21. Glycosidic linkage of cellulose






22. 3 physiological roles of lipids






23. Interconversion btw two anomers






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






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






26. Unique feature of glycine






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






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






29. Acetic acid formula?






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






31. Adjacent polypeptide strands running in opposite directions in Beta pleated sheet structure






32. 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






33. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






34. What stabilizes lipid bilayer?






35. Rule for all amino acids that are nonbasic and nonacidic pertaining to pI value?






36. Glyceraldehyde






37. Glycosidic linkage of lactose






38. 4 causes of denaturation of proteins






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






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






41. Fatty acid structure






42. Formula for urea






43. 2 reasons why fats have more efficient energy stores than carbs






44. Glycosidic linkage of sucrose






45. Name for 6 membered ring






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






47. Storage form of fatty acid that is composed of 3 esterified fatty acid to a glycerol molecule






48. Hydrolysis






49. Sugar with an aldehyde at the first carbon position






50. 2 covalent bonds formed in proteins