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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. 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






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






3. Enzyme that hydrolyzes maltose into 2 glucose molecules?






4. Glycosidic linkage of lactose






5. Energy storage molecule of carbohydrates for animals






6. Characteristics of polar amino acids






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






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






9. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






10. Name for 5 membered ring






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






12. 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






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






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






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






16. Acidic amino acids






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






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






19. Glyceraldehyde






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






21. Fxn of cholesterol in the membrane?






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






23. Naturally occurring carbohydrates are formed from what?






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






25. Glycosidic linkage of maltose






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






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






28. Unique feature of proline






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






30. Histidine






31. Basic amino acids






32. 4 causes of denaturation of proteins






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






34. Characteristics of acidic amino acids






35. 2 covalent bonds formed in proteins






36. Physiological pH






37. Energy storage molecule of carbohydrates for plants






38. 3 physiological roles of lipids






39. Characteristics of hydrophobic amino acids






40. Nonpolar - hydrophobic amino acids






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






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






43. Fatty acid structure






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






45. Name for 6 membered ring






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






47. 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)






48. Sugar with an aldehyde at the first carbon position






49. Glycosidic linkage of cellulose






50. Unique feature of glycine