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






2. Molecules with the same atoms - but different bonds






3. Name for 5 membered ring






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






5. Physiological pH






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






7. Acidic amino acids






8. 3 physiological roles of lipids






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






10. Polar amino acids






11. Characteristic of basic amino acids






12. 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)






13. 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






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






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






16. Interconversion btw two anomers






17. Glycosidic linkage of cellulose






18. D and L describe what?






19. Energy storage molecule of carbohydrates for animals






20. What stabilizes lipid bilayer?






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






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






23. Unique feature of cysteine






24. Name for 6 membered ring






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






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






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






28. Glycosidic linkage of lactose






29. Naturally occurring carbohydrates are formed from what?






30. Fxn of cholesterol in the membrane?






31. Nonpolar - hydrophobic amino acids






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






33. Enzyme that hydrolyzes lactose into galactose and glucose into






34. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






35. Sulfur containing amino acids






36. Energy storage molecule of carbohydrates for plants






37. 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






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






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






40. Unique feature of glycine






41. Sugar with an aldehyde at the first carbon position






42. Fatty acid structure






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






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






45. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






47. 3 carbon triol that forms backbone of triacylglycerol






48. Acetic acid formula?






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






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







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