Biochemistry ACS Final Exam With Complete Solutions 2024

Biochemistry ACS Final Exam With Complete Solutions 2024 What is the D configuration of a sugar in a Fisher projection? - answerchyrol carbon furthest from the carboxyl group hydroxyl on right What is the L configuration of a sugar in a Fisher projection? - answerhydroxyl on left What is the difference between glycogen and amylopectin? - answerglycogen- has branches about every 10 residues (more highly branched) amylopectin- has branches about every 25 What is amylose made up of? - answerglucose What makes up starch? - answeramylose amlyopectin What is a glycosidic bond? - answerlinks two monosaccharides together at points 1 and 4 What is the difference between an alpha(1-4) and beta(1-4) linkage? - answeralpha: when the oxygen is pointed down in a glycosidic bond beta: when the oxygen is pointed up in a glycosidic bond What is the definition of a carbohydrate? - answerall have hydroxyl and carbonyl functional groups Difference between aldose and ketose - answeraldose has an aldohyde ketose has a ketone What makes up sucrose? - answerfructose and glucose monosaccharides What makes up lactose? - answerglucose and galactose monosaccharides What makes up mannose? - answertwo glucose monosaccharides What are lipids? - answersoluble in other nonpolar solvents (not water) What are triglycerides composed of? - answerglycerol and three fatty acids What is saponification? - answerbase hydrolysis of a triglyceride or other fat strong base is added breaks ester linkages to release hydroxyls and form glycerol What has a higher level of unsaturation -- oils or fats? - answeroils liquid at room temperature What is the structure of the plasma membrane? - answerhydrophylic head hydrophobic fatty acid tails proteins span the phospholipid bilayer Why type of amino acid is present in the plasma membrane among the fatty acid tails? - answerhydrophobic/nonpolar What is passive transport (simple diffusion)? - answerno energy required no protein required move from high concentration to low conce