BioMolecules (Carbohydrates & Amino acids) Test - 1

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BioMolecules (Carbohydrates & Amino acids) Test - 1

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BioMolecules (Carbohydrates & Amino acids) Test - 1

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Question 1/2
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Which of the following is a reducing sugar?

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A
Glucose

Correct

Wrong

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B
Maltose

Correct

Wrong

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C
Lactose

Correct

Wrong

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D
Sucrose

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Solutions

Although according to common names of sugars, those which have -ose ending are reducing like glucose, fructose, cellobiose, etc. Sucrose although has -ose ending is not a reducing sugar. Thus common names are not reliable indicators of the properties of sugars. Sucrose is 1, 1'-glycoside, hence non-reducing.
Question 2/2
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Which of the following statements is/are correct?

Correct

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A
In sucrose, glucose is present in the pyranose from while fructose is present in the furanose form

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B
Sucrose is a non-reducing sugar

Correct

Wrong

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C
In lactose, glucose is the non-reducing sugar, while galactose is the reducing sugar

Correct

Wrong

Skipped
D
In sucrose, glucose and fructose both are present in pyranose form

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Solutions

Sucrose is a non-reducing sugar. In sucrose, glucose is present in the pyranose from while fructose is present in the furanose form. In lactose, glucose is the reducing sugar

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