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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. Naturally occurring carbohydrates are formed from what?






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






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






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






5. Unique feature of proline






6. 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






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






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






9. 2 covalent bonds formed in proteins






10. Characteristics of acidic amino acids






11. Glycosidic linkage of cellulose






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






13. Glycosidic linkage of lactose






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






15. Rule for all amino acids that are nonbasic and nonacidic pertaining to pI value?






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






17. Polar amino acids






18. Unique feature of glycine






19. Glyceraldehyde






20. 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






21. 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






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






23. Hydrophilic amino acids






24. Characteristics of polar amino acids






25. 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)






26. Fxn of cholesterol in the membrane?






27. Enzyme that hydrolyzes lactose into galactose and glucose into






28. Nonpolar - hydrophobic amino acids






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






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






31. Fatty acid structure






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






33. Enzymes that hydrolyze fats






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






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






36. Sulfur containing amino acids






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






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






39. Glycosidic linkage of maltose






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






41. 3 carbon triol that forms backbone of triacylglycerol






42. Molecules with the same atoms - but different bonds






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






44. Basic amino acids






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






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






47. Formula for urea






48. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






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