Multiple Choice QuestionsThe letter 'D' in D-glucose signifies
configuration at all chiral carbons
dextrorotatory
that it is a monosaccharide
configuration at a particular chiral carbon
α-maltose consists of
one α-D-glucopyranose unit and one β-D-glucopyranose unit with 1-2 glycosidic linkage.
two α-D-glucopyranose units with 1-2 glycosidic linkage
two β-D-glucopyranose unit with 1-4 glycosidic linkage.
two α-D-glucopyranose units with 1-4 glycosidic linkage
Which one of the following does not correctly match with each other?
Silk-polyamide
Lipase enzyme
Butter fat
oxytocin-enzyme
Oils are liquids at room temperature since they contain higher percentage of
oleates
palmitates
stearates
myristates
A.
oleates
Oils, which are liquids at ordinary temperatures, contain a large proportion of unsaturated acids, like oleic acid, linoleic acid, linolenic acid .The facts which are solids at ordinary temperatures, contain a large proportion of saturated acids, like-myristic acid, palmitic acid, steanc acid eg, glyceryl trioleate, which contains unsaturated acids components is an oil. Glyceryl tnstearate which contains only saturated acids component is a fat.
A given sample of milk turns sour at room temperature (27°C) in 5 h. In a refrigerator at - 3°C, it can be stored 10 times longer. The energy of activation for the souring of milk is
2.303 × 5 R kJ mol-1
2.303 × 3 R kJ mol-1
2.303 × 2.7 R kJ mol-1
2.303 × 10 R kJ mol-1
Sucrose is not a reducing sugar since
it contains no free aldehyde or keto group adjacent to, -CHOH group
it is built up of a fructose unit
it is optically active
it is chemically stable
Dialysis can be used to separate
protein and starch
glucose and protein
glucose and NaCl
glucose and fructose
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