CHEM 210 Biochemistry Module 4 Exam /Portage
Biochemistry- Module 4 QUESTIONS AND ANSWERS
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Is the following molecule an aldose or ketose? Briefly explain. - (answers)ketose.
There is a C=O on the third carbon from the top.
Which carbon in erythrose would tell you if the monosaccharide is D or L? Give
the carbon's number in your answer. - (answers)On carbon number 3, which is the
penultimate carbon.
Glucose and mannose are epimers. Name another epimer of glucose besides
mannose. - (answers)Galactose
Is the following structure a D or L carbohydrate? Briefly explain. - (answers)L. The
-OH group is on the left side on the penultimate carbon.
Does the compound C7H14O8 fit the formal definition of a carbohydrate? Explain.
- (answers)No. This compound has does not fit the formula CnH2nOn as indicated
in the module. There is one additional oxygen in this compound.
Which of the following is carbon number 3? (Indicate by the appropriate letter.) -
(answers)C
Which carbon in this molecule is the anomeric carbon? (Indicate by the
appropriate letter.) - (answers)A
, Is the following a furan or pyran ring? Briefly explain. - (answers)furan. There are
only five atoms in the ring: one oxygen and four carbons.
When is the alpha 1→6 connection typically found in carbohydrates? -
(answers)The alpha 1→6 bond is found in polysaccharides when branching occurs.
Is the following an alpha 1→4 or beta 1→4 connection? Briefly explain. -
(answers)This is a beta 1→4 because the molecule on the left has the oxygen in
the up, or beta, position.
What are the similarities and differences between amylose and amylopectin?
Explain in at least three complete sentences. - (answers)Similarities: Both of are
homopolysaccharides of glucose. They each have alpha 1 → 4 connections
between glucose. They each are part of starch.
Differences: Amylopectin has branching with alpha 1→6 linkages. Amylose does
not. Amylopectin is typically larger than amylose.
How is chitin different from cellulose? - (answers)Chitin has glucose with
derivatives attached. -NH-CO-CH3 is connected to each glucose.
Where are alpha 1 → 6 bonds found in carbohydrates? - (answers)They are found
where glycogen and amylopectin branch.
Biochemistry- Module 4 QUESTIONS AND ANSWERS
| ALREADY PASSED | 2025 LATEST!!
Is the following molecule an aldose or ketose? Briefly explain. - (answers)ketose.
There is a C=O on the third carbon from the top.
Which carbon in erythrose would tell you if the monosaccharide is D or L? Give
the carbon's number in your answer. - (answers)On carbon number 3, which is the
penultimate carbon.
Glucose and mannose are epimers. Name another epimer of glucose besides
mannose. - (answers)Galactose
Is the following structure a D or L carbohydrate? Briefly explain. - (answers)L. The
-OH group is on the left side on the penultimate carbon.
Does the compound C7H14O8 fit the formal definition of a carbohydrate? Explain.
- (answers)No. This compound has does not fit the formula CnH2nOn as indicated
in the module. There is one additional oxygen in this compound.
Which of the following is carbon number 3? (Indicate by the appropriate letter.) -
(answers)C
Which carbon in this molecule is the anomeric carbon? (Indicate by the
appropriate letter.) - (answers)A
, Is the following a furan or pyran ring? Briefly explain. - (answers)furan. There are
only five atoms in the ring: one oxygen and four carbons.
When is the alpha 1→6 connection typically found in carbohydrates? -
(answers)The alpha 1→6 bond is found in polysaccharides when branching occurs.
Is the following an alpha 1→4 or beta 1→4 connection? Briefly explain. -
(answers)This is a beta 1→4 because the molecule on the left has the oxygen in
the up, or beta, position.
What are the similarities and differences between amylose and amylopectin?
Explain in at least three complete sentences. - (answers)Similarities: Both of are
homopolysaccharides of glucose. They each have alpha 1 → 4 connections
between glucose. They each are part of starch.
Differences: Amylopectin has branching with alpha 1→6 linkages. Amylose does
not. Amylopectin is typically larger than amylose.
How is chitin different from cellulose? - (answers)Chitin has glucose with
derivatives attached. -NH-CO-CH3 is connected to each glucose.
Where are alpha 1 → 6 bonds found in carbohydrates? - (answers)They are found
where glycogen and amylopectin branch.
