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






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






3. What stabilizes lipid bilayer?






4. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






6. Unique feature of glycine






7. Glycosidic linkage of sucrose






8. What kind of lipids compromise the lipid bilayer?






9. Acetic acid formula?






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






11. Characteristics of polar amino acids






12. Fatty acid structure






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






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






15. Characteristics of hydrophobic amino acids






16. 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






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






18. 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






19. Molecules with the same atoms - but different bonds






20. Glycosidic linkage of lactose






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






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






23. Characteristic of basic amino acids






24. Acidic amino acids






25. Sugar with an aldehyde at the first carbon position






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






27. Energy storage molecule of carbohydrates for animals






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






29. Formula for urea






30. 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)






31. Characteristics of acidic amino acids






32. 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






33. Hydrophilic amino acids






34. D and L describe what?






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






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






37. 3 carbon triol that forms backbone of triacylglycerol






38. Unique feature of cysteine






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






40. Hydrolysis






41. Enzymes that hydrolyze fats






42. 4 causes of denaturation of proteins






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






44. Nonpolar - hydrophobic amino acids






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






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






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






48. Name for 5 membered ring






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






50. Glycosidic linkage of cellulose