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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. Naturally occurring carbohydrates are formed from what?






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






3. Fxn of cholesterol in the membrane?






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






5. 2 covalent bonds formed in proteins






6. 3 physiological roles of lipids






7. Acidic amino acids






8. Glycosidic linkage of cellulose






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






10. What stabilizes lipid bilayer?






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






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






13. (+) and (-) 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. 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






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






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






18. Enzymes that hydrolyze fats






19. Name for 5 membered ring






20. Characteristic of basic amino acids






21. Characteristics of hydrophobic amino acids






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






23. Molecules with the same atoms - but different bonds






24. Hydrolysis






25. Glycosidic linkage of maltose






26. Polar amino acids






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






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






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






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






31. Characteristics of polar amino acids






32. Acetic acid formula?






33. Hydrophilic amino acids






34. Glycosidic linkage of lactose






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






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






37. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






38. Unique feature of cysteine






39. Characteristics of acidic amino acids






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






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






42. Physiological pH






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






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






45. Fatty acid structure






46. What kind of lipids compromise the lipid bilayer?






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






48. Nonpolar - hydrophobic amino acids






49. Enzyme that hydrolyzes lactose into galactose and glucose into






50. 3 carbon triol that forms backbone of triacylglycerol