MCB 354 EXAM 3 WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
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Course
MCB 354
Institution
MCB 354
What are the linear polysaccharides? - ACCURATE ANSWERS amylose, cellulose
What are the branched polysaccharides? - ACCURATE ANSWERS glycogen and starch
How do you calculate the amount of stereoisomers in a sugar? - ACCURATE ANSWERS n chiral centers= 2^n stereoisomers
What denotes a D suga...
MCB 354 EXAM 3
MCB 354 EXAM 3 WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
What are the linear polysaccharides? - ACCURATE ANSWERS✔✔
amylose, cellulose
What are the branched polysaccharides? - ACCURATE ANSWERS✔✔
glycogen and starch
How do you calculate the amount of stereoisomers in a sugar? -
ACCURATE ANSWERS✔✔ n chiral centers= 2^n stereoisomers
What denotes a D sugar from an L sugar in the linear conformation? -
ACCURATE ANSWERS✔✔ D: last OH group on right
L: last OH group on left
,What are epimers? - ACCURATE ANSWERS✔✔ stereoisomers that
differ only in configuration around one carbon
True/False: Once an anomeric carbon participates in a glycosidic bond,
it cannot convert to the linear form, nor act as a reducing sugar. -
ACCURATE ANSWERS✔✔ TRUE
Where does N-glycosylation occur? What signals it? - ACCURATE
ANSWERS✔✔ Lumen of the rough ER at exposed NX(S/T) motif
asparagine, any AA, Serine or threonine
transferred from a lipid carrier
True/False: There is a template for making sugars? - ACCURATE
ANSWERS✔✔ False
What is starch a mixture of? What linkages are in each component? -
ACCURATE ANSWERS✔✔ amylose- linear alpha 1-4
amylopectine polymer of linear alpha 1-4 segments with occasional
alpha 1-6
Why must you have branching in amylopectin? - ACCURATE
ANSWERS✔✔ enzymes would only be able to take form one end and
would be very slow search for glucose, branching allows multiple
working points
, What is the difference between glycogen and amylopectin? -
ACCURATE ANSWERS✔✔ glycogen has more frequent alpha 1-6
links
What is the most stable conformation of alpha 1-4 links in glucose? -
ACCURATE ANSWERS✔✔ helical arrangement
What type of linkages are found in cellulose? - ACCURATE
ANSWERS✔✔ beta 1-4 links, stabilized by intra chain and inter-chain
H bonding
VERY LITTLE WATER BINDING
What are glycosaminoglycans? - ACCURATE ANSWERS✔✔ linear
polymers made of repeating disaccharide units, repeating GlcNAc and
GalNAc
found in ECM
Highly negatively charged
Where is most excess glucose stored? - ACCURATE ANSWERS✔✔
liver, secondary muscles
What is used to prime the reaction to begin a new molecule of glycogen?
- ACCURATE ANSWERS✔✔ Glycogenin, protein primer
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