객관식
How are disaccharides formed from monosaccharides?
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9. Carbohydrates
Glycosidic Bond
객관식
The molecular formula of glucose is C6H12O6. What is the molecular formula for an oligosaccharide made by linking 10 glucose molecules together by dehydration synthesis? (Hint: Consider how many glycosidic bonds form).
A
C60H120O60
B
(C6H12O6)10.
C
C60H102O51.
D
C60H100O50.
검증된 단계별 안내1
Understand that dehydration synthesis involves the removal of a water molecule (H2O) for each glycosidic bond formed between glucose molecules.
Calculate the number of water molecules removed: For 10 glucose molecules linked together, 9 glycosidic bonds are formed, thus 9 water molecules are removed.
Determine the molecular formula of the initial 10 glucose molecules: (C6H12O6)10, which is C60H120O60.
Subtract the atoms of the 9 water molecules removed: Each water molecule is H2O, so 9 H2O molecules contribute 18 hydrogen atoms and 9 oxygen atoms, resulting in a total removal of H18O9.
Adjust the molecular formula by subtracting the atoms removed: C60H120O60 - H18O9 = C60H102O51, which is the molecular formula for the oligosaccharide.
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