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






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






3. 2 reasons why fats have more efficient energy stores than carbs






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






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






6. Polar amino acids






7. Unique feature of proline






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






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






10. 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






11. D and L describe what?






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






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






14. What stabilizes lipid bilayer?






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






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






17. 4 causes of denaturation of proteins






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






19. Name for 5 membered ring






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






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






22. Glycosidic linkage of maltose






23. Enzymes that hydrolyze fats






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






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






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






27. Hydrolysis






28. Acetic acid formula?






29. Sulfur containing amino acids






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






31. Interconversion btw two anomers






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






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






34. Hydrophilic amino acids






35. What kind of lipids compromise the lipid bilayer?






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






37. Energy storage molecule of carbohydrates for plants






38. Glycosidic linkage of cellulose






39. Unique feature of glycine






40. Histidine






41. Glycosidic linkage of sucrose






42. 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






43. Characteristics of acidic amino acids






44. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






45. Molecules with the same atoms - but different bonds






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






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






48. Energy storage molecule of carbohydrates for animals






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






50. Unique feature of cysteine