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 Multiple Choice QuestionsMultiple Choice Questions

41.

Zwitter ion is formed by

  • aniline

  • acetanilide

  • benzoic acid

  • glycine


42.

Stachyose is a

  • monosaccharide

  • disaccharide

  • trisaccharide

  • tetrasaccharide


43.

White precipitate is formed in

  • Millon's test

  • ninhydrin test

  • biuret test

  • xanthoprotic test


44.

The compound, which give a positive ninhydrin test and a negative Benedict's solution test, is

  • a monosaccharide

  • a disaccharide

  • a lipid

  • a protein


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45.

Which of the following can absorb over 90% of its own mass of water and also does not stick to wounds?

  • Saran

  • Thiokol

  • Rayon

  • Gun cotton


46.

The prosthetic group of haemoglobin is

  • porphin

  • globulin

  • haem

  • gelatin


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47.

Which of the following is a trisaccharide ?

  • Stachyrose

  • Sucrose

  • Raffinose

  • Ribose


C.

Raffinose

On hydrolysis stachyrose gives four, sucrose gives two raffinose gives three and ribose gives no molecule, of monosaccharides. Thus, only raffinose is a trisaccharide.

C18H32O16 + H2O → 3C6H12O6


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48.

Glucose on reaction with Br2 water gives

  • glucaric acid

  • gluconic acid

  • saccharic acid

  • citric acid


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49.

During conversion of glucose into glucose cyanohydrin, which functional group/atom of glucose is replaced?

  • Hydrogen

  • Aldehydic group

  • Primary alcoholic group

  • Secondary alcoholic, group


50.

Which of the following proteins is globular?

  • Collagen

  • Albumin

  • Myosin

  • Fibroin


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