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






2. Fatty acid structure






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






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






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






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






7. Glycosidic linkage of maltose






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






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






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






11. Glyceraldehyde






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






13. 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)






14. Glycosidic linkage of lactose






15. 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






16. Unique feature of glycine






17. Energy storage molecule of carbohydrates for animals






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






19. Name for 6 membered ring






20. Energy storage molecule of carbohydrates for plants






21. 3 carbon triol that forms backbone of triacylglycerol






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






23. Characteristic of basic amino acids






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






25. 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






26. D and L describe what?






27. Hydrolysis






28. Hydrophilic amino acids






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






30. Enzyme that hydrolyzes lactose into galactose and glucose into






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






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






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






34. Sugar with an aldehyde at the first carbon position






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






36. 3 physiological roles of lipids






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






38. What kind of lipids compromise the lipid bilayer?






39. Histidine






40. Fxn of cholesterol in the membrane?






41. 2 reasons why fats have more efficient energy stores than carbs






42. Acidic amino acids






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






44. Characteristics of polar amino acids






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






46. Formula for urea






47. Polar amino acids






48. Naturally occurring carbohydrates are formed from what?






49. Basic amino acids






50. Characteristics of acidic amino acids