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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. Fxn of cholesterol in the membrane?






2. Characteristics of polar amino acids






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






4. Enzyme that hydrolyzes maltose into 2 glucose molecules?






5. 4 causes of denaturation of proteins






6. Molecule can act as a base and as an acid






7. Molecules with the same atoms and same bonds - but different bond geometries; can either be enantiomers or diastereomers






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






9. What stabilizes lipid bilayer?






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






11. Unique feature of proline






12. D and L describe what?






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






14. Name for 5 membered ring






15. 3 physiological roles of lipids






16. Energy storage molecule of carbohydrates for animals






17. Acidic amino acids






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






19. 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)






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






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






22. PH at which positive and negative charges balance to form a zwitterion






23. Separation is due to charge - with negative charge moving toward positive electrode and positive charge moving toward negative electrode






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






25. Nonpolar - hydrophobic amino acids






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






27. Enzymes that hydrolyze fats






28. Characteristics of acidic amino acids






29. Glycosidic linkage of maltose






30. Sugar with an aldehyde at the first carbon position






31. Diastereomers that vary in the configuration of 1 chiral center






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






33. Glyceraldehyde






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






35. Glycosidic linkage of sucrose






36. 2 covalent bonds formed in proteins






37. Physiological pH






38. Enzyme that hydrolyzes lactose into galactose and glucose into






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






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






41. Fatty acid structure






42. Covalent bond formed btw carboxyl group of one atom and the amino group of another amino acid in an addition - elimination mechanism - enzymes are required to carry out rxn






43. Hydrolysis






44. Sulfur containing amino acids






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






46. Unique feature of cysteine






47. Polar amino acids






48. 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






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






50. Hydrophilic amino acids