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






2. Enzyme that hydrolyzes maltose into 2 glucose molecules?






3. Physiological pH






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






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






6. Formula for urea






7. Hydrolysis






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






9. Energy storage molecule of carbohydrates for plants






10. 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






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






12. Interconversion btw two anomers






13. 2 reasons why fats have more efficient energy stores than carbs






14. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






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






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






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






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






20. Polar amino acids






21. D and L describe what?






22. Characteristics of polar amino acids






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






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






25. Name for 6 membered ring






26. Nonpolar - hydrophobic amino acids






27. 4 causes of denaturation of proteins






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






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






30. Name for 5 membered ring






31. Enzymes that hydrolyze fats






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






33. What stabilizes lipid bilayer?






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






35. Sugar with an aldehyde at the first carbon position






36. 3 carbon triol that forms backbone of triacylglycerol






37. Sulfur containing amino acids






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






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






40. Acidic amino acids






41. Molecules with the same atoms - but different bonds






42. Energy storage molecule of carbohydrates for animals






43. Glycosidic linkage of maltose






44. What kind of lipids compromise the lipid bilayer?






45. Fatty acid structure






46. 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






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






48. 2 covalent bonds formed in proteins






49. Fxn of cholesterol in the membrane?






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