Question 1

Which of the following best describes the glycosidic linkage in lactose?

Accepted Answer

$\beta(1 \rightarrow 4)$$

Question 2

Which enzyme is responsible for hydrolyzing the $$\alpha(1 \rightarrow 4)$$ glycosidic bonds in amylose?

Accepted Answer

Amylase

Question 3

Which of the following polysaccharides is composed of $$\beta-D-$$glucose units linked by $$\beta(1 \rightarrow 4)$$ glycosidic bonds and forms strong fibers due to extensive hydrogen bonding?

Accepted Answer

Cellulose

Question 4

Which of the following statements about glycogen is TRUE?

Accepted Answer

It is a branched polymer with $$\alpha(1 \rightarrow 4)$$ and $$\alpha(1 \rightarrow 6)$$ linkages.

Question 5

Which disaccharide is composed of $$\alpha-$$glucose and $$\beta-$$fructose joined by an $$\alpha(1 \rightarrow 2)$$ glycosidic bond?

Accepted Answer

Sucrose

Question 6

A patient is unable to digest cellulose in their diet. This is because humans lack which enzyme?

Accepted Answer

Cellulase

Question 7

Which of the following best describes amylopectin?

Accepted Answer

A branched polymer of $$\alpha-$$glucose with $$\alpha(1 \rightarrow 4)$$ and $$\alpha(1 \rightarrow 6)$$ linkages

Question 8

Which of the following is a heteroglycan found in bacterial cell walls?

Accepted Answer

Peptidoglycan

Question 9

Which of the following is a glycosidic bond formed by the condensation of two alcohol groups?

Accepted Answer

Glycosidic linkage

Question 10

Which of the following best explains why cellulose is a strong structural material in plants?

Accepted Answer

It forms a non-helical structure with extensive intrachain and interchain hydrogen bonding.

Question 11

Which of the following is TRUE about chitin?

Accepted Answer

It is a polymer of N-acetylglucosamine with $$\beta(1 \rightarrow 4)$$ linkages.

Question 12

Which of the following is a homoglycan found in animal tissues and serves as a major energy storage molecule?

Accepted Answer

Glycogen

Question 13

Which of the following best describes the difference between amylose and amylopectin?

Accepted Answer

Amylose is linear, while amylopectin is branched.

Question 14

Which of the following is a glycoprotein?

Accepted Answer

A protein with covalently attached carbohydrate groups

Question 15

Which of the following best explains why starch can be digested by humans but cellulose cannot?

Accepted Answer

Starch contains $$\alpha(1 \rightarrow 4)$$ linkages, which can be hydrolyzed by amylase, while cellulose contains $$\beta(1 \rightarrow 4)$$ linkages, which cannot be hydrolyzed by human enzymes.

Question 16

Which of the following is a real-life application of glycosidic bond hydrolysis?

Accepted Answer

The breakdown of dietary starch in the human digestive tract

Question 17

Which of the following best describes the structure of sucrose?

Accepted Answer

$$\alpha-$$glucose and $$\beta-$$fructose joined by an $$\alpha(1 \rightarrow 2)$$ glycosidic bond

Question 18

Which of the following is a function of proteoglycans?

Accepted Answer

Structural support in the extracellular matrix of animals

Question 19

Which of the following best describes the branching pattern in glycogen?

Accepted Answer

Branches occur every 8-12 glucose units via $$\alpha(1 \rightarrow 6)$$ linkages

Disaccharides and Polysaccharides: Structure, Types, and Biological Roles

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