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 Multiple Choice QuestionsMultiple Choice Questions

161.

A diabetic person carries a packet of glucose with him always, because

  • glucose reduces the blood sugar level slowly

  • glucose increases the blood sugar level slowly

  • glucose reduces the blood sugar level

  • glucose increases the blood sugar level almost instantaneously


162.

There are 20 naturally occurring amino acids. The maximum number of tripeptides that can be obtained is

  • 8000

  • 6470

  • 7465

  • 5360


163.

The letter 'D' in D-glucose signifies

  • configuration at all chiral carbons

  • dextrorotatory

  • that it is a monosaccharide

  • configuration at a particular chiral carbon


164.

In alkaline medium, alanine exists predominantly as

  • anion

  • Zwitter ion

  • cation

  • Covalent form


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165.

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


166.

Which one of the following does not correctly match with each other?

  • Silk-polyamide

  • Lipase enzyme

  • Butter fat

  • oxytocin-enzyme


167.

Glucose when reduced with HI and red phosphorus gives

  • n-hexane

  • n-heptane

  • n-pentane

  • n-octane


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168.

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.

        


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169.

The number of disulphide linkages present in insulin are

  • 4

  • 3

  • 2

  • 1


170.

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


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