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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. Glyceraldehyde






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






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






4. Acetic acid formula?






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






6. Physiological pH






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






8. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






10. Fxn of cholesterol in the membrane?






11. 3 physiological roles of lipids






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






13. Interconversion btw two anomers






14. Enzymes that hydrolyze fats






15. Unique feature of glycine






16. Unique feature of proline






17. D and L describe what?






18. Name for 6 membered ring






19. Molecules with the same atoms - but different bonds






20. 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






21. Hydrolysis






22. What kind of lipids compromise the lipid bilayer?






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






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






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






26. Glycosidic linkage of lactose






27. 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






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






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






30. 3 carbon triol that forms backbone of triacylglycerol






31. Fatty acid structure






32. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






34. Polar amino acids






35. Hydrophilic amino acids






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






37. 4 causes of denaturation of proteins






38. Enzyme that hydrolyzes lactose into galactose and glucose into






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






40. Characteristic of basic amino acids






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






42. Basic amino acids






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






44. Unique feature of cysteine






45. Characteristics of polar amino acids






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






47. 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






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






49. Naturally occurring carbohydrates are formed from what?






50. Characteristics of hydrophobic amino acids