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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. Fxn of cholesterol in the membrane?






2. Unique feature of cysteine






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






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






5. Basic amino acids






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






7. Physiological pH






8. Unique feature of glycine






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






10. Glycosidic linkage of lactose






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






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






13. Acidic amino acids






14. Interconversion btw two anomers






15. Glycosidic linkage of sucrose






16. 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






17. Enzymes that hydrolyze fats






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






19. Sugar with an aldehyde at the first carbon position






20. Polar amino acids






21. What kind of lipids compromise the lipid bilayer?






22. Glycosidic linkage of cellulose






23. 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






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






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






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






27. Name for 6 membered ring






28. Characteristics of acidic amino acids






29. Characteristic of basic amino acids






30. Formula for urea






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






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






33. 2 covalent bonds formed in proteins






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






35. Molecules with the same atoms - but different bonds






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






37. Fatty acid structure






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






39. Naturally occurring carbohydrates are formed from what?






40. Histidine






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






42. Energy storage molecule of carbohydrates for animals






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






44. Nonpolar - hydrophobic amino acids






45. Sulfur containing amino acids






46. Hydrophilic amino acids






47. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






49. What stabilizes lipid bilayer?






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