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






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






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






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






5. What kind of lipids compromise the lipid bilayer?






6. 3 carbon triol that forms backbone of triacylglycerol






7. Characteristic of basic amino acids






8. Acetic acid formula?






9. Unique feature of glycine






10. Interconversion btw two anomers






11. 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






12. Sulfur containing amino acids






13. Polar amino acids






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






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






16. Glycosidic linkage of lactose






17. 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






18. Enzymes that hydrolyze fats






19. Enzyme that hydrolyzes lactose into galactose and glucose into






20. Histidine






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






22. Fxn of cholesterol in the membrane?






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






24. 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)






25. Unique feature of proline






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






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






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






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






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






31. 3 physiological roles of lipids






32. Glycosidic linkage of maltose






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






34. Name for 5 membered ring






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






36. Acidic amino acids






37. 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






38. Glyceraldehyde






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






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






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






42. Enzyme that hydrolyzes maltose into 2 glucose molecules?






43. Fatty acid structure






44. Hydrophilic amino acids






45. D and L describe what?






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






47. Sugar with an aldehyde at the first carbon position






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






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






50. Energy storage molecule of carbohydrates for animals