Question 1

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

Accepted Answer

Lactose

Question 2

Which disaccharide forms a 1→1 glycosidic linkage?

Accepted Answer

Sucrose

Question 3

What is the identity of the disaccharide below, given the structure with glucose and fructose joined by a glycosidic bond?

Accepted Answer

Sucrose

Question 4

Which statement is true regarding the equilibrium of sugar rings in disaccharides?

Accepted Answer

Both sugar rings A and B are in equilibrium with their linear chain forms.

Question 5

Name the monosaccharide units and the glycosidic linkage in the disaccharide gentibiose.

Accepted Answer

Glucose and glucose, with a $$\beta-1$$,4 linkage

Question 6

Given the following information, draw a Haworth projection for the disaccharide gentibiose. The glycosidic linkage is $$\beta-1$$,4. Which carbon atoms are involved in the linkage?

Accepted Answer

C1 of the first glucose and C4 of the second glucose

Question 7

Which of the following is NOT a common disaccharide found in nature?

Accepted Answer

Cellulose

Question 8

What type of glycosidic bond is present in lactose?

Accepted Answer

$$\beta-1$$,4 linkage

Question 9

Which disaccharide is composed of glucose and fructose?

Accepted Answer

Sucrose

Question 10

Which of the following statements about maltose is correct?

Accepted Answer

It is composed of two glucose units joined by an $$\alpha-1$$,4 linkage.

Question 11

Which of the following disaccharides is NOT digestible by humans?

Accepted Answer

Cellobiose

Question 12

A patient is unable to digest lactose. Which enzyme is most likely deficient?

Accepted Answer

Lactase

Question 13

Which of the following best describes the structure of sucrose?

Accepted Answer

Glucose and fructose joined by an $$\alpha-1$$,2 linkage

Question 14

Which of the following is a reducing sugar?

Accepted Answer

Maltose

Question 15

Which glycosidic linkage is found in cellobiose?

Accepted Answer

$$\beta-1$$,4 linkage

Question 16

Which of the following disaccharides is formed from two glucose molecules?

Accepted Answer

Maltose

Question 17

Which of the following is the most abundant disaccharide in nature?

Accepted Answer

Sucrose

Question 18

Which of the following statements about glycosidic bonds is correct?

Accepted Answer

They are covalent bonds formed between the anomeric carbon of one sugar and a hydroxyl group of another.

Disaccharides: Structure, Linkages, and Properties

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