ACS BIOCHEMISTRY FINAL EXAM 2024 ACTUAL EXAM COMPLETE 200
QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS)
ALREADY GRADED A+
What is the D configuration of a sugar in a
Fisher projection? - CORRECT ANSWER
>>>>chyrolcarbon furthest from the carboxyl
group hydroxyl on right
What is the L configuration of a sugar in a
Fisher projection? - CORRECT ANSWER
>>>>hydroxyl on left
What is the difference between glycogen and
amylopectin? - CORRECT ANSWER
>>>>glycogen- has branches about every 10
residues (more highly branched)
,2|Page
amylopectin- has branches about every 25
What is amylose made up of? - CORRECT
ANSWER >>>>glucose
What makes up starch? - CORRECT ANSWER
>>>>amylose
amlyopectin
What is a glycosidic bond? - CORRECT ANSWER
>>>>links two monosaccharides together at
points 1 and 4
What is the difference between an alpha(1-4)
and beta(1-4) linkage? - CORRECT ANSWER
>>>>alpha: when the oxygen is pointed down in
a glycosidic bond
beta: when the oxygen is pointed up in a
glycosidic bond
,3|Page
What is the definition of a carbohydrate? -
CORRECT ANSWER >>>>all have hydroxyl and
carbonyl functional groups
Difference between aldose and ketose -
CORRECT ANSWER >>>>aldose has an aldohyde
ketose has a ketone
What makes up sucrose? - CORRECT ANSWER
>>>>fructose and glucose monosaccharides
What makes up lactose? - CORRECT ANSWER
>>>>glucose and galactose monosaccharides
What makes up mannose? - CORRECT ANSWER
>>>>two glucose monosaccharides
What are lipids? - CORRECT ANSWER
>>>>soluble in other nonpolar solvents (not
water)
, 4|Page
What are triglycerides composed of? - CORRECT
ANSWER >>>>glycerol and three fatty acids
What is saponification? - CORRECT ANSWER
>>>>base 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? - CORRECT ANSWER >>>>oils
liquid at room temperature
What is the structure of the plasma
membrane? - CORRECT ANSWER
>>>>hydrophylic head
hydrophobic fatty acid tails
proteins span the phospholipid bilayer
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