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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. Enzyme that hydrolyzes maltose into 2 glucose molecules?






2. 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






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. Diastereomers that vary in the configuration of 1 chiral center






5. Enzymes that hydrolyze fats






6. Glycosidic linkage of lactose






7. Molecules with the same atoms - but different bonds






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






9. 2 reasons why fats have more efficient energy stores than carbs






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






11. Name for 6 membered ring






12. Unique feature of glycine






13. Hydrolysis






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






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






16. Glycosidic linkage of sucrose






17. Histidine






18. 2 covalent bonds formed in proteins






19. D and L describe what?






20. Characteristics of polar amino acids






21. Fatty acid structure






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






23. Sugar with a carbonyl group at the 2 carbon position






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






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






26. 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






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






28. Acetic acid formula?






29. 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






30. Glyceraldehyde






31. Characteristic of basic amino acids






32. Characteristics of acidic amino acids






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






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






35. 3 carbon triol that forms backbone of triacylglycerol






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






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






38. Enzyme that hydrolyzes lactose into galactose and glucose into






39. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






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






42. Unique feature of proline






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






44. What stabilizes lipid bilayer?






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






46. 3 physiological roles of lipids






47. Sugar with an aldehyde at the first carbon position






48. Formula for urea






49. Glycosidic linkage of cellulose






50. Nonpolar - hydrophobic amino acids