Reference no: EM1382184
Which of the following groups is NOT ionizable?
Select one:
a. Guanidinium
b. Imidazole
c. Phosphoryl
d. Amine
e. Aldehyde
When a fatty acid reacts with glycerol, the result is-
Select one:
a. Formation of an amide
b. Formation of an ester
c. Formation of hydrocarbon
d. Formation of a thio-ester
e. None of the above
In which of the following functional groups ionization is stabilized by resonance?
Select one:
a. Carboxyl
b. Hydroxyl
c. Amine
d. Aldehyde
e. All of the above
A glycosidic bond would be present in:
Select one:
a. acetone.
b. methyl-alpha-D-glucose.
c. 2-deoxy-beta-D-ribose.
d. glucose-6-phosphate.
e. fructose-1, 6-bisphosphate.
Which of the following pairs of functional groups CANNOT react with each other by a dehydration reaction?
Select one:
a. Carboxyl;Hydroxyl
b. Carboxyl;Sulfhydryl
c. Phosphate;Hydroxyl
d. Amino;carboxyl
e. All can react through dehydration
f carbon 1 is the carbonyl group of a 6-carbon aldose (aldohexose), which carbon determines if the sugar is a D- or L- stereoisomer?
Select one:
a. 1
b. 2
c. 3
d. 4
e. 5
Carbohydrate characteristic chemical features include:
Select one:
a. the potential to form multiple hydrogen bonds.
b. the existence of one or more asymmetric centers.
c. the capacity to form polymeric structures.
d. the ability to exist in either linear or ring structures.
e. all are true.
Which of the following sugars does NOT contains an ? (1 ? 4) O-glycosidic bond?
Select one:
a. amilose
b. amylopectin
c. glycogen
d. cellulose
Which of the following does NOT contain a guanidinium group
Select one:
a. Urea
b. arginine
c. creatine
d. guanidinium ion
D-glucose differs from D-galactose only in the arrangement around carbon 4. Therefore D-glucose and D-galactose are-
Select one:
a. enantiomers
b. epimers
c. mirror images
d. not optical isomers
e. Anomers
Which of the following compounds results from cyclization of glucose?
Select one:
a. alpha-D-glucopyronose
b. beta-D-glucopyronose
c. alpha-D-glucofuranose
d. beta-D-glucofuranose
e. All of the above
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