Question 1

Which of the following best describes a dehydration reaction in the formation of biological polymers?

Accepted Answer

A reaction in which a water molecule is removed to form a covalent bond between monomers.

Question 2

Which of the following is a correct example of a monosaccharide and its function in living organisms?

Accepted Answer

Glucose; serves as a primary energy source for cells.

Question 3

What is the main difference between hydrolysis and dehydration synthesis in the context of macromolecule metabolism?

Accepted Answer

Hydrolysis breaks polymers by adding water, while dehydration synthesis joins monomers by removing water.

Question 4

Which of the following best explains why enzymes are necessary for the synthesis and breakdown of macromolecules?

Accepted Answer

Enzymes are specialized macromolecules that catalyze the making or breaking of covalent bonds.

Question 5

A student is studying the structure of glucose and notices it contains several hydroxyl groups. Which functional group is represented by the hydroxyl group, and what is its chemical formula?

Accepted Answer

Hydroxyl group; $\mathrm{OH}$

Question 6

Which of the following statements about carbohydrates is correct?

Accepted Answer

Carbohydrates are generally composed of simple sugars (monosaccharides) and their polymers.

Question 7

Which of the following is a correct example of a dehydration reaction?

Accepted Answer

Joining two glucose molecules to form maltose and releasing a water molecule.

Question 8

A biologist is analyzing a sample of plant cell walls. Which polysaccharide is she most likely to find, and what is its primary function?

Accepted Answer

Cellulose; structural support in plant cell walls

Question 9

Which of the following best describes the relationship between monomers and polymers?

Accepted Answer

Polymers are large molecules made by joining together many small monomers.

Question 10

Which of the following reactions would be used by your body to digest a complex carbohydrate like starch into glucose monomers?

Accepted Answer

Hydrolysis

Question 11

A molecule of sucrose is formed from glucose and fructose. What type of bond is formed between these two monosaccharides, and what is released during the reaction?

Accepted Answer

Glycosidic bond; water

Question 12

Which of the following best explains why glycogen is important for animals?

Accepted Answer

It is an energy storage polysaccharide that can be rapidly mobilized.

Question 13

Which of the following is a correct statement about the structure of monosaccharides?

Accepted Answer

They can form ring structures in aqueous solutions due to dehydration reactions.

Question 14

A student mixes two amino acids together and observes the release of a water molecule. Which type of reaction has occurred, and what type of bond is formed?

Accepted Answer

Dehydration synthesis; peptide bond

Question 15

Which of the following best describes the role of enzymes in the formation and breakdown of polymers?

Accepted Answer

Enzymes catalyze both the synthesis and hydrolysis of polymers by lowering the activation energy.

Question 16

Which of the following is a correct example of a functional group found in carbohydrates, and what is its significance?

Accepted Answer

Hydroxyl group; makes carbohydrates soluble in water

Question 17

Which of the following best explains why cellulose cannot be digested by most animals?

Accepted Answer

Cellulose has a unique glycosidic linkage that most animals lack the enzyme to hydrolyze.

Question 18

A patient is unable to break down lactose into its monosaccharide components. Which type of reaction is impaired, and what enzyme is likely deficient?

Accepted Answer

Hydrolysis; lactase

Question 19

Which of the following equations correctly represents the hydrolysis of a disaccharide?

Accepted Answer

$C_{12}H_{22}O_{11} + H_2O \rightarrow C_6H_{12}O_6 + C_6H_{12}O_6$

Question 20

Which of the following best describes the difference between starch and glycogen?

Accepted Answer

Starch is used for energy storage in plants, while glycogen is used in animals.

Macromolecules and Carbohydrates: Structure, Function, and Biological Importance

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