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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. Fxn of cholesterol in the membrane?






2. 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






3. Glyceraldehyde






4. Physiological pH






5. Unique feature of cysteine






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






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






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






9. Nonpolar - hydrophobic amino acids






10. Characteristics of acidic amino acids






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






12. 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






13. 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






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






15. D and L describe what?






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






17. Hydrolysis






18. Acidic amino acids






19. Characteristics of hydrophobic amino acids






20. Energy storage molecule of carbohydrates for animals






21. Interconversion btw two anomers






22. 2 reasons why fats have more efficient energy stores than carbs






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






24. Energy storage molecule of carbohydrates for plants






25. Sugar with an aldehyde at the first carbon position






26. 2 covalent bonds formed in proteins






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






28. Name for 5 membered ring






29. Acetic acid formula?






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






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






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






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






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






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






36. What kind of lipids compromise the lipid bilayer?






37. Glycosidic linkage of maltose






38. 3 carbon triol that forms backbone of triacylglycerol






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






40. Polar amino acids






41. Characteristic of basic amino acids






42. Glycosidic linkage of lactose






43. 3 physiological roles of lipids






44. Naturally occurring carbohydrates are formed from what?






45. 4 causes of denaturation of proteins






46. Histidine






47. Enzymes that hydrolyze fats






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






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






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