BioMolecules (Carbohydrates & Amino acids) Test

Result

BioMolecules (Carbohydrates & Amino acids) Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is a reducing sugar?

A
Glucose

B
Maltose

C
Lactose

D
Sucrose

Solution

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
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Which of the following statements is/are correct?

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

B
Sucrose is a non-reducing sugar

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

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

Solution

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