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






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






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






4. 3 physiological roles of lipids






5. Interconversion btw two anomers






6. Glycosidic linkage of maltose






7. What kind of lipids compromise the lipid bilayer?






8. Formula for urea






9. Histidine






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






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






12. Energy storage molecule of carbohydrates for animals






13. Polar amino acids






14. Energy storage molecule of carbohydrates for plants






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






16. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






17. Physiological pH






18. Glycosidic linkage of sucrose






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






20. Hydrolysis






21. Unique feature of glycine






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






23. 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)






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






25. 2 covalent bonds formed in proteins






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






27. 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






28. Enzyme that hydrolyzes maltose into 2 glucose molecules?






29. Characteristics of polar amino acids






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






31. Acidic amino acids






32. Name for 6 membered ring






33. Molecules with the same atoms - but different bonds






34. Characteristic of basic amino acids






35. Enzymes that hydrolyze fats






36. Enzyme that hydrolyzes lactose into galactose and glucose into






37. Sugar with an aldehyde at the first carbon position






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






39. Acetic acid formula?






40. Glycosidic linkage of cellulose






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






42. Unique feature of cysteine






43. Naturally occurring carbohydrates are formed from what?






44. Sulfur containing amino acids






45. Name for 5 membered ring






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






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






48. 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






49. 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






50. 4 causes of denaturation of proteins