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CBSE Class 12 Chemistry 2019 Outside Delhi Set 3 Solved Paper

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Question : 13 of 13
Marks: +1, -0
(a) Write the product when D-glucose reacts with Br2(aq)\mathrm{Br}_2(\mathrm{aq}).
(b) What type of bonding provides stability to α\alpha-helix structure of protein?
(c) Name the vitamin whose deficiency causes pernicious anaemia.
OR
Define the following terms:
(a) Invert sugar
(b) Native protein
(c) Nucleotide
Solution:  
(b) Intramolecular hydrogen bonding.(c) Vitamin B12B_{12}.
OR(i) Hydrolysis of sucrose brings a change of sign of rotation from dextro(+) to laevo(-) and the product is named as invert sugar.
(ii) Protein found in biological system with unique three dimensional structure and biological activity is called native protein.
(iii) A unit formed by the combination of nitrogenous base, pentose sugar and phosphate.
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