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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. Sugar with an aldehyde at the first carbon position






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






3. Interaction btw polypeptide subunits arranged in polypeptide. can be covalent bonds or intermolecular forces - disulfide bond that does not form btw residues on the same protein affect (blank)






4. 2 covalent bonds formed in proteins






5. Glyceraldehyde






6. Basic amino acids






7. 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






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






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






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






11. 3 carbon triol that forms backbone of triacylglycerol






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






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






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






15. Enzymes that hydrolyze fats






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






17. Acidic amino acids






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






19. 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






20. What kind of lipids compromise the lipid bilayer?






21. Histidine






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






23. 4 causes of denaturation of proteins






24. Characteristic of basic amino acids






25. Unique feature of glycine






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






27. Characteristics of acidic amino acids






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






29. Energy storage molecule of carbohydrates for animals






30. 3 physiological roles of lipids






31. Physiological pH






32. Characteristics of hydrophobic amino acids






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






34. Polar amino acids






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






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






37. Glycosidic linkage of maltose






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






39. Interconversion btw two anomers






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






41. Sulfur containing amino acids






42. Energy storage molecule of carbohydrates for plants






43. Glycosidic linkage of lactose






44. Hydrolysis






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






46. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






47. Characteristics of polar amino acids






48. Fxn of cholesterol in the membrane?






49. Name for 6 membered ring






50. 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