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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. Unique feature of glycine






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






3. Fatty acid structure






4. Enzymes that hydrolyze fats






5. What kind of lipids compromise the lipid bilayer?






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






7. What stabilizes lipid bilayer?






8. Enzyme that hydrolyzes lactose into galactose and glucose into






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






10. Nonpolar - hydrophobic amino acids






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






12. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






14. 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






15. Formula for urea






16. Unique feature of proline






17. (+) and (-) describe what?






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






19. 2 covalent bonds formed in proteins






20. Fxn of cholesterol in the membrane?






21. Glycosidic linkage of sucrose






22. Acetic acid formula?






23. Acidic amino acids






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






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






26. Characteristics of acidic amino acids






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






28. 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






29. Characteristics of polar amino acids






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






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






32. Glyceraldehyde






33. 2 reasons why fats have more efficient energy stores than carbs






34. Characteristics of hydrophobic amino acids






35. Sugar with an aldehyde at the first carbon position






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






37. Name for 5 membered ring






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






39. Name for 6 membered ring






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






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






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






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






44. 4 causes of denaturation of proteins






45. Enzyme that hydrolyzes maltose into 2 glucose molecules?






46. Physiological pH






47. Glycosidic linkage of lactose






48. Naturally occurring carbohydrates are formed from what?






49. Energy storage molecule of carbohydrates for animals






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