BIOCHEM EXAM SCRIPT 2025/2026 QUESTIONS WITH
ANSWERS GRADED A+
✔✔amylose and amylopectin are both polymers of:
a. alpha-D-glucose
b. beta-D-glucose
c. galactose
d. idose
e. maltose - ✔✔a. alpha-D-glucose
*cellulose and chitin = beta-D-glucose
*starch, glycogen, amylose, and amylopectin = alpha-D-glucose
✔✔which statement about starch and glycogen is false?
a. amylose is unbranched; amylopectin and glycogen contain many branches
b. both are heteropolymers of glucose
c. both have many -OH groups in their structures
d. both starch and glycogen are energy storage polysaccharides
e. glycogen is more extensively branched than starch - ✔✔b. both are heteropolymers
of glucose
✔✔which statement about starch and glycogen is false?
a. both have beta-D-glucose monomers
b. both starch and glycogen are energy storage polysaccharides
c. both are homopolymers of glucose
d. glycogen is more extensively branched that starch
e. both have O-glycosidic linkages - ✔✔a. both have beta-D-glucose monomers
*starch and glycogen have alpha-D-glucose monomers
✔✔which monosaccharide is not a 6-carbon monosaccharide?
a. idose
b. glucose
c. galactose
d. dihydroxyacetone
e. allose - ✔✔d. dihydroxyacetone
✔✔which monosaccharide is not a 6-carbon monosaccharide?
a. fructose
b. ribose
, c. mannose
d. galactose
e. glucose - ✔✔b. ribose
✔✔what are the 2 monosaccharides shown below? - ✔✔aldose (1 C2OH group)
ketose (2 C3OH groups)
✔✔the 2 monosaccharides shown below could be best described as:
a. anomers
b. aldoses
c. ketoses
d. epimers
e. pentoses - ✔✔d. epimers
*epimers = D/l
anomers = alpha/beta
✔✔what is an anomeric carbon? - ✔✔the new chiral center formed in ring closure; it
was the carbon containing the carbonyl in the straight-chain form
attached to an -OR group, -OH group, C, and H
✔✔which arrow correctly identifies the atom that will become the anomeric carbon? -
✔✔carbon-1, which is at the top of the Fischer structure
✔✔based on the form of the cyclic sugar below in a Haworth projection, which Fischer
projection formula could have formed this structure? - ✔✔*look at the Haworth
projection and create Fischer projections for it
✔✔the following monosaccharides are covalently bonded. what type of bond unites
them? - ✔✔alpha 1-->6
✔✔which statement about cellulose is true?
a. cellulose is found in plants
b. cellulose in the primary storage polysaccharide of animal cells
c. cellulose is found in DNA
d. the glucose residues of cellulose contain the same configuration as the glucose
residues of amylose
e. cellulose is an epimer of chitin - ✔✔a. cellulose is found in plants
✔✔which statement about cellulose is true?
ANSWERS GRADED A+
✔✔amylose and amylopectin are both polymers of:
a. alpha-D-glucose
b. beta-D-glucose
c. galactose
d. idose
e. maltose - ✔✔a. alpha-D-glucose
*cellulose and chitin = beta-D-glucose
*starch, glycogen, amylose, and amylopectin = alpha-D-glucose
✔✔which statement about starch and glycogen is false?
a. amylose is unbranched; amylopectin and glycogen contain many branches
b. both are heteropolymers of glucose
c. both have many -OH groups in their structures
d. both starch and glycogen are energy storage polysaccharides
e. glycogen is more extensively branched than starch - ✔✔b. both are heteropolymers
of glucose
✔✔which statement about starch and glycogen is false?
a. both have beta-D-glucose monomers
b. both starch and glycogen are energy storage polysaccharides
c. both are homopolymers of glucose
d. glycogen is more extensively branched that starch
e. both have O-glycosidic linkages - ✔✔a. both have beta-D-glucose monomers
*starch and glycogen have alpha-D-glucose monomers
✔✔which monosaccharide is not a 6-carbon monosaccharide?
a. idose
b. glucose
c. galactose
d. dihydroxyacetone
e. allose - ✔✔d. dihydroxyacetone
✔✔which monosaccharide is not a 6-carbon monosaccharide?
a. fructose
b. ribose
, c. mannose
d. galactose
e. glucose - ✔✔b. ribose
✔✔what are the 2 monosaccharides shown below? - ✔✔aldose (1 C2OH group)
ketose (2 C3OH groups)
✔✔the 2 monosaccharides shown below could be best described as:
a. anomers
b. aldoses
c. ketoses
d. epimers
e. pentoses - ✔✔d. epimers
*epimers = D/l
anomers = alpha/beta
✔✔what is an anomeric carbon? - ✔✔the new chiral center formed in ring closure; it
was the carbon containing the carbonyl in the straight-chain form
attached to an -OR group, -OH group, C, and H
✔✔which arrow correctly identifies the atom that will become the anomeric carbon? -
✔✔carbon-1, which is at the top of the Fischer structure
✔✔based on the form of the cyclic sugar below in a Haworth projection, which Fischer
projection formula could have formed this structure? - ✔✔*look at the Haworth
projection and create Fischer projections for it
✔✔the following monosaccharides are covalently bonded. what type of bond unites
them? - ✔✔alpha 1-->6
✔✔which statement about cellulose is true?
a. cellulose is found in plants
b. cellulose in the primary storage polysaccharide of animal cells
c. cellulose is found in DNA
d. the glucose residues of cellulose contain the same configuration as the glucose
residues of amylose
e. cellulose is an epimer of chitin - ✔✔a. cellulose is found in plants
✔✔which statement about cellulose is true?
