BIOCHEMISTRY ACS EXAMINATION
TEST 2026 FULL QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉What is the L configuration of a sugar in a Fisher projection?
ANSWER: - hydroxyl on left
◉What is the difference between glycogen and amylopectin?
ANSWER: - glycogen- has branches about every 10 residues (more
highly branched)
amylopectin- has branches about every 25
◉What is amylose made up of? ANSWER: - glucose
◉What makes up starch? ANSWER: - amylose
amylopectin
◉What is a glyosidic bond? ANSWER: - links two monosaccharides
together at points 1 and 4
, ◉What is the difference between an alpha (1-4) and beta (1-4) linkage?
ANSWER: - alpha: when the oxygen is pointed down in a glyosidic
bond
beta: when the oxygen is pointed up in a glyosidic bond
◉What is the definition of a carbohydrate? ANSWER: - all have
hydroxyl and carbonyl functional groups
◉Difference between aldose and ketose ANSWER: - aldose has an
aldehyde
ketose has a ketone
◉What makes up sucrose? ANSWER: - fructose and glucose
monosaccharides
◉What makes up lactose? ANSWER: - glucose and galactose
monosaccharides
◉What makes up mannose? ANSWER: - two glucose monosaccharides
◉What are lipids? ANSWER: - soluble in other nonpolar solvents (not
water)
TEST 2026 FULL QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉What is the L configuration of a sugar in a Fisher projection?
ANSWER: - hydroxyl on left
◉What is the difference between glycogen and amylopectin?
ANSWER: - glycogen- has branches about every 10 residues (more
highly branched)
amylopectin- has branches about every 25
◉What is amylose made up of? ANSWER: - glucose
◉What makes up starch? ANSWER: - amylose
amylopectin
◉What is a glyosidic bond? ANSWER: - links two monosaccharides
together at points 1 and 4
, ◉What is the difference between an alpha (1-4) and beta (1-4) linkage?
ANSWER: - alpha: when the oxygen is pointed down in a glyosidic
bond
beta: when the oxygen is pointed up in a glyosidic bond
◉What is the definition of a carbohydrate? ANSWER: - all have
hydroxyl and carbonyl functional groups
◉Difference between aldose and ketose ANSWER: - aldose has an
aldehyde
ketose has a ketone
◉What makes up sucrose? ANSWER: - fructose and glucose
monosaccharides
◉What makes up lactose? ANSWER: - glucose and galactose
monosaccharides
◉What makes up mannose? ANSWER: - two glucose monosaccharides
◉What are lipids? ANSWER: - soluble in other nonpolar solvents (not
water)