Module 4 Quiz Flashcards
Aldose vs Ketose monosaccharide
Aldose: C=O top end
Ketose: C=O not on top; CH2OH top
General structural pattern
CnH(2n)On
Which carbon in erythrose would tell you if the monosaccharide is D or L? Give the carbon’s number in your answer.
On carbon number 3, which is the penultimate carbon.
Name three epimers.
Glucose, mannose, galactose
Define Epimers
Monosaccharides that differ in orientation at only one position; posses the same physical and chemical properties but differ in 3D arrangement
D or L carbohydrate?
Penultimate carbon -OH left –> L
Penultimate carbon -OH right –> D
Furan vs Pyran ring
Furan –> 5 atoms (4 C, 1O)
Pyranose –> 6 atoms
Alpha vs Beta
-OH up –> Beta
-OH down –> alpha
When is the alpha 1–>6 connection typically found in carbohydrates?
found in polysaccharides when branching occurs.
What are the similarities and differences between amylose and amylopectin? Explain in at least three complete sentences.
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?
Chitin has glucose with derivatives attached. -NH-CO-CH3 is connected to each glucose.
Where are
alpha 1 –>6 bonds found in carbohydrates?
They are found where glycogen and amylopectin branch.
In what ways are amylose and a protein alike?
They both can form alpha helices.
What is the name of the carbohydrate found in beetle exoskeleton?
Chitin.
