ln a disaccharide, if carbon atoms are 12 then how many OH groups will be present?
Correct answer: C. 8
- A. 11
- B. 10
- C. 8
- D. 12
Explanation
11: This option suggests that there are 11 OH groups present in the disaccharide with 12 carbon atoms. However, this is not accurate. 10: This option suggests that there are 10 OH groups present in the disaccharide with 12 carbon atoms. However, this is not accurate either. 8: The correct option is 8. In a disaccharide, there are two sugar units (monosaccharides) linked together by a glycosidic bond. Each monosaccharide has several hydroxyl groups (-OH) attached to its carbon atoms.If a disaccharide has 12 carbon atoms in total, then each monosaccharide has six carbon atoms. In the two monosaccharide units, there are five carbon atoms with hydroxyl group (-OH) and one carbonyl group. The two monosccharides have 10 hydroxyl groups (-OH) in total. Now, to become a disaccharide, a glycosidic bond needs to form. This requires two hydroxyl groups. A water molecule is released while C-O forms the glycosidic bond.Therefore, in the disaccharide, the total number of hydroxyl groups will be 10 - 2 = 8. 12: This option suggests that there are 12 OH groups present in the disaccharide with 12 carbon atoms. However, this is not accurate. The correct answer is 8 hydroxyl groups.In summary, option c) 8 is the correct option. In a disaccharide with 12 carbon atoms, there are 8 hydroxyl groups, which are part of the two monosaccharide units linked together by a glycosidic bond.
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