$$\text{D-Galactose} - \beta(1 \rightarrow 4) - \text{D-Glucose}$$

Question 1

Which of the following disaccharides contains galactose as one of its sugar subunits?

Accepted Answer

Lactose

Question 2

What type of glycosidic linkage is present in maltose?

Accepted Answer

$$\alpha-1$$,4 linkage

Question 3

Which disaccharide is formed from two D-glucose units joined by a $$\beta-1$$,4 glycosidic bond?

Accepted Answer

Cellobiose

Question 4

Which of the following disaccharides is NOT a reducing sugar?

Accepted Answer

Sucrose

Question 5

A patient is unable to digest lactose due to a deficiency in which enzyme?

Accepted Answer

Lactase

Question 6

Which disaccharide is commonly found in milk?

Accepted Answer

Lactose

Question 7

What is the identity of the disaccharide shown below?

$$	ext{D-Glucose} - \beta(1 ightarrow 4) - 	ext{D-Glucose}$$

Accepted Answer

Cellobiose

Question 8

Which of the following disaccharides contains a $$\alpha-1$$,2 glycosidic linkage?

Accepted Answer

Sucrose

Question 9

If a food sample tests positive for reducing sugars but negative for sucrose, which disaccharide is most likely present?

Accepted Answer

Lactose

Question 10

Which of the following is the correct structure for lactose?

Accepted Answer

$$	ext{D-Galactose} - \beta(1 ightarrow 4) - 	ext{D-Glucose}$$

Question 11

Which disaccharide is formed by the combination of D-glucose and D-fructose?

Accepted Answer

Sucrose

Question 12

A chemist hydrolyzes a disaccharide and obtains only D-glucose. Which of the following could be the original disaccharide?

Accepted Answer

Maltose

Question 13

Which of the following statements about cellobiose is TRUE?

Accepted Answer

It contains a $$\beta-1$$,4 glycosidic linkage between two D-glucose units.

Question 14

Which of the following disaccharides is most likely to be found in germinating seeds?

Accepted Answer

Maltose

Question 15

A patient with lactose intolerance would have difficulty digesting which glycosidic bond?

Accepted Answer

$$\beta-1$$,4 linkage

Question 16

Which of the following is a correct description of the glycosidic linkage in sucrose?

Accepted Answer

$$\alpha-1$$,2 linkage between glucose and fructose

Question 17

Which of the following disaccharides is formed by a $$\beta-1$$,4 linkage between D-galactose and D-glucose?

Accepted Answer

Lactose

Question 18

Which disaccharide would yield both D-glucose and D-galactose upon hydrolysis?

Accepted Answer

Lactose

Question 19

Which of the following is a reducing sugar?

Accepted Answer

Lactose

Question 20

Which of the following disaccharides is most likely to be found in cellulose hydrolysates?

Accepted Answer

Cellobiose

Disaccharides: Types, Linkages, and Examples

Study Guide - Practice Questions