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Biochem Quiz 6
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What is true about naturally occurring monosaccharides?
D-isomers predominate
D,L do not specify the sign of rotation of plane-polarized light
The intramolecular cyclization reaction of glucose in solution ______.
generates an asymmetric carbon
What specific bond links the monomers of cellulose?
B(1-4) glycosidic
Isomers of monosaccharides that differ only in their configuration about the asymmetric carbon are called _____.
anomers
Hydrolysis of lactose will yield _____.
glucose and galactose
The cell wall in Gram-negative bacteria consists of two lipid bilayers with ____ between the two bilayers.
peptidoglycan
The O-glycosidic linkage commonly occurs through ___ residues.
serine
Amylose has more non-reducing ends than amylopectin.
True
False
False
_____ is the most abundant natural polymer in the world.
Cellulose
Glycosaminoglycans are linear chains of repeating disaccharides in which one unit is an amino sugar and one or both is negatively charged. [T/F]
True
False
True
D-amino acids are often found in...
peptidoglycans
Name the following molecule.
Phosphotidlycholine
______ cleave fatty acids or polar head groups from a glycerophospholipid, producing lysophospholipids, phosphodiaclyglycerols or diacylglycerols.
Phospholipases
Dihydroxyacetone is an aldotriose. [T/F]
True
False
F
The intramolecular cyclization reaction of glucose in solution generates an asymmetric carbon yielding a cyclic hemiacetal. [T/F]
True
False
T
The anomeric carbon in glucose is found at the ___ position.
C-1
An amino sugar has a ____ group at the C-2 position, as in glucosamine.
NH2
Anylose and amylopectin of starch are each composed of ____ residues.
Glucose
Glycogen is similar to amylopectin but also contains galactose residues and is more highly branched. [T/F]
True
False
F
The phosphorylase enzyme releases the carbohydrate on the ___ end.
non-reducing
Which is more heavily branched? Starch of glycogen?
glycogen
Heparin is a glycosaminoglycans. [T/F]
True
False
True
In what compounds are D-amino acids an important constituent?
peptidoglycans
N-linked saccharides are attached via the ____ nitrogens of _____ residues.
amide
asparagine
Author
Skitty2004
ID
250855
Card Set
Biochem Quiz 6
Description
biochemistry quiz 6 last
Updated
12/5/2013, 3:38:11 AM
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