CBSE Class 12 Chemistry Biomolecules Assignment

CBSE Class 12 Chemistry Biomolecules Assignment. Students are advised to refer to the attached assignments and practise them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.
Level one questions

1.Name the sugar present in milk.
Ans: Lactose
2.How many monosaccharide units are present in it?
Ans: two monosaccharide units are present.
3.What are such oligosaccharides called?
Ans: Such oligosaccharides are called disaccharides
4. How do you explain the presence of all the six carbon atoms in glucose in a straight chain?
Ans: On prolonged heating with HI, glucose gives n-hexane.
5.Name the linkage connecting monosaccharide units in polysaccharides.
Ans: Glycosidic linkage.
6.Under what conditions glucose is converted to gluconic and saccharic acid?
Ans: Glucose is converted to gluconic acid by bromine water and to saccharic acid by conc. HNO3.
7.Which sugar is called invert sugar?
Ans: Sucrose.
8.During curdling of milk, what happens to sugar present in it?
Ans: It converts into Lactic acid.
9. Monosaccharide contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide moleculeare also considered for classification. In which class of monosaccharide willyou place fructose?
Ans:Fructose is a ketohexose.
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