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Question
What do you understand by the term glycosidic linkage?
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Solution
Glycosidic linkage refers to the linkage formed between two monosaccharide units through an oxygen atom by the loss of a water molecule.
For example, in a sucrose molecule, two monosaccharide units, α-glucose and β-fructose, are joined together by a glycosidic linkage.
Sucrose
RELATED QUESTIONS
Answer the following question.
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HNO3
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Match the following enzyms given in Column I with the reactions they catalyse given in Column II.
| Column I (Enzymes) | Column II (Reactions) |
| (i) Invertase | (a) Decomposition of urea into NH3 and CO2 |
| (ii) Maltase | (b) Conversion of glucose into ethyl alcohol |
| (iii) Pepsin | (c) Hydrolysis of maltose into glucose |
| (iv) Urease | (d) Hydrolysis of cane sugar |
| (v) Zymase | (e) Hydrolysis of proteins into peptides |
Maltose is made of
Lactose on hydrolysis yields
Which disaccharide is present in milk?
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Maltose on treatment with dilute HC?
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| S. No. | Time (hours) | Specific Rotation |
| 1 | 0 | + 66.5° |
| 2 | ∞ | - 39.9° |
- Account for the two specific rotation values.
- What is the specific name given to sucrose based on the above observation?
- One of the products formed during the hydrolysis of sucrose is a glucose, that reacts with hydroxylamine to give compound A. Identify compound A.
