题目
单项选择题
Fehling's test relies on the oxidative state of copper ions to measure which attribute of carbohydrates?[Fill in the blank]
选项
A.a. Levels of reducing sugars
B.b. Degree of retrogradation
C.c. Levels of amylose content
D.d. Degree of gelatinisation
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标准答案
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思路分析
The question asks about what Fehling's test measures in carbohydrates by looking at the oxidative state of copper ions.
Option a: Levels of reducing sugars. This is correct because Fehling's test detects reducing sugars that can donate electrons to cupric ions (Cu2+), ......Login to view full explanation登录即可查看完整答案
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类似问题
Fehling's test relies on the oxidative state of copper ions to measure which attribute of carbohydrates?[Fill in the blank]
What does the Fehling’s test detect?
In the lab, you are testing an unknown solution using Benedict’s test. After you add Benedict’s reagent, the unknown solution appears yellow. As you write up your lab report, how should you explain this result? This is a negative result, so the unknown must have a free aldehyde or ketone reactive group, and reducing sugar is not present. This is a positive result, so the unknown must have a free aldehyde or ketone reactive group, and reducing sugar is present. This is a positive result, so the unknown must have a free aldehyde or ketone reactive group, so a polysaccharide is present. This is a negative result, so the unknown must have a free aldehyde or ketone reactive group, so a polysaccharide is not present.
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