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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. Naturally occurring carbohydrates are formed from what?






2. Interconversion btw two anomers






3. Characteristics of acidic amino acids






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






5. Glyceraldehyde






6. Acetic acid formula?






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






8. Formula for urea






9. Energy storage molecule of carbohydrates for animals






10. 3 carbon triol that forms backbone of triacylglycerol






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






12. Nonpolar - hydrophobic amino acids






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






14. Fxn of cholesterol in the membrane?






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






16. Physiological pH






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






18. What stabilizes lipid bilayer?






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






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






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






22. Molecules with the same atoms - but different bonds






23. What kind of lipids compromise the lipid bilayer?






24. Polar amino acids






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






26. Characteristics of polar amino acids






27. Unique feature of glycine






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






29. 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






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






31. Histidine






32. Enzymes that hydrolyze fats






33. Glycosidic linkage of cellulose






34. Hydrolysis






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






36. Glycosidic linkage of lactose






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






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






39. 3 physiological roles of lipids






40. Energy storage molecule of carbohydrates for plants






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






42. Enzyme that hydrolyzes lactose into galactose and glucose into






43. Name for 6 membered ring






44. Unique feature of proline






45. D and L describe what?






46. 4 causes of denaturation of proteins






47. 2 reasons why fats have more efficient energy stores than carbs






48. Epimers of sugars that vary in the configuration of their anomeric carbons






49. Sugar with an aldehyde at the first carbon position






50. 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)