Question 1

Which of the following best describes a glycosidic bond?

Accepted Answer

A bond formed between a sugar's anomeric carbon and another chemical group, often another sugar.

Question 2

What is the molecular formula for an oligosaccharide made by linking 13 glucose molecules together by dehydration synthesis?

Accepted Answer

$$\mathrm{C$$_{78}$$H_{130}O$$_{65}}$

Question 3

Which of the following is NOT a primary type of glycosidic bond found in carbohydrates?

Accepted Answer

N-glycosidic bond

Question 4

A glycosidic bond is named based on which two criteria?

Accepted Answer

Configuration and number of carbon atoms involved

Question 5

What is the name for the glycosidic linkage in the following disaccharide: glucose (C1) to glucose (C4), with the anomeric carbon in the alpha configuration?

Accepted Answer

$$\alpha-1$$,4 glycosidic linkage

Question 6

Which of the following molecules does NOT contain a 1,4 glycosidic linkage?

Accepted Answer

A

Question 7

In the structure of raffinose, which sugar is attached via an $$\alpha-1$$,6 glycosidic bond?

Accepted Answer

Galactose

Question 8

Which of the following statements about reducing sugars is correct?

Accepted Answer

A reducing sugar has a free anomeric carbon that can act as a reducing agent.

Question 9

Which glycosidic bond is present in maltose?

Accepted Answer

$$\alpha-1$$,4 glycosidic bond

Question 10

If a branched oligosaccharide contains both $$\alpha-1$$,4 and $$\alpha-1$$,6 glycosidic bonds, which structure does it most closely resemble?

Accepted Answer

Glycogen

Question 11

Which of the following is true regarding the formation of a glycosidic bond?

Accepted Answer

It is formed by a dehydration reaction, releasing a molecule of water.

Question 12

Which of the following is a non-reducing sugar?

Accepted Answer

Sucrose

Question 13

Which step is necessary to name a glycosidic bond in a disaccharide?

Accepted Answer

Identify the configuration ($$\alpha or$$ $$\beta) of $$the anomeric carbon involved.

Question 14

Which of the following best explains why cellulose is insoluble in water?

Accepted Answer

It contains $$\beta-1$$,4 glycosidic bonds that form strong hydrogen bonds between chains.

Question 15

Which of the following is a correct description of an N-glycosidic bond?

Accepted Answer

A bond between the anomeric carbon of a sugar and a nitrogen atom.

Question 16

Which of the following oligosaccharides contains both reducing and non-reducing ends?

Accepted Answer

Maltotriose

Question 17

Which enzyme is responsible for breaking $$\alpha-1$$,4 glycosidic bonds in starch during digestion?

Accepted Answer

Amylase

Question 18

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

Accepted Answer

Lactase

Question 19

Which of the following is a branched polysaccharide found in animals and serves as a major energy storage molecule?

Accepted Answer

Glycogen

Question 20

Which of the following best describes the difference between $$\alpha- $$and $$\beta-$$glycosidic bonds?

Accepted Answer

$$\alpha-$$glycosidic bonds have the anomeric carbon's OH group pointing down, while $$\beta-$$glycosidic bonds have it pointing up.

Glycosidic Bonds and Oligosaccharide Structure

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