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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. Interconversion btw two anomers






2. Characteristic of basic amino acids






3. Molecules with the same atoms - but different bonds






4. 2 reasons why fats have more efficient energy stores than carbs






5. Enzymes that hydrolyze fats






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






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






8. Histidine






9. Glycosidic linkage of maltose






10. Characteristics of polar amino acids






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






12. Name for 5 membered ring






13. What kind of lipids compromise the lipid bilayer?






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






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






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






17. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






18. Glycosidic linkage of cellulose






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






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






21. Sugar with an aldehyde at the first carbon position






22. Basic amino acids






23. 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






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






25. Fxn of cholesterol in the membrane?






26. Fatty acid structure






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






28. Formula for urea






29. Sulfur containing amino acids






30. Unique feature of cysteine






31. 3 carbon triol that forms backbone of triacylglycerol






32. Acidic amino acids






33. Characteristics of hydrophobic amino acids






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






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






36. Glycosidic linkage of lactose






37. 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






38. Polar amino acids






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






40. Characteristics of acidic amino acids






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






42. Hydrophilic amino acids






43. 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






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






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






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






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






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






49. Naturally occurring carbohydrates are formed from what?






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