Question 1

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

Accepted Answer

A reaction where water is removed to join monomers into a polymer.

Question 2

Which formula represents a hexose monosaccharide, a common carbohydrate monomer?

Accepted Answer

$$C_6H_{12}O_6$

Question 3

Which of the following statements about lipids is TRUE?

Accepted Answer

Lipids store about 2.5 times more energy per gram than carbohydrates.

Question 4

A cow can digest cellulose in grass because:

Accepted Answer

The cow's stomach contains fungi that digest cellulose.

Question 5

Which of the following is a disaccharide formed by the dehydration of glucose and fructose?

Accepted Answer

Sucrose

Question 6

What is the main reason hydrocarbons in lipids are hydrophobic?

Accepted Answer

They form nonpolar covalent bonds, so they do not interact with water.

Question 7

Which of the following is a correct ratio of carbon, hydrogen, and oxygen in carbohydrates?

Accepted Answer

$$1:2:1$$

Question 8

Which of the following is NOT a function of lipids in living organisms?

Accepted Answer

Catalyzing chemical reactions

Question 9

Which polysaccharide is used for long-term energy storage in animals?

Accepted Answer

Glycogen

Question 10

What is the structural difference between starch and cellulose?

Accepted Answer

Starch has alpha linkages, while cellulose has beta linkages between glucose monomers.

Question 11

Which of the following best explains why plants can store energy as carbohydrates, but animals often store energy as lipids?

Accepted Answer

Plants do not move, so they can store energy in heavier forms like carbohydrates.

Question 12

Which of the following is a correct example of a modified complex carbohydrate?

Accepted Answer

Chitin

Question 13

A scientist is studying a molecule with the formula $$C_{16}H$$_{32}$$O_2. $$Which class of biomolecule does this most likely represent?

Accepted Answer

Lipid

Question 14

Which of the following is a function of carbohydrates in living organisms?

Accepted Answer

Forming cell walls in plants and fungi

Question 15

Which of the following best describes hydrolysis?

Accepted Answer

A reaction that adds water to break polymers into monomers.

Question 16

Which of the following is a correct pairing of a carbohydrate and its function?

Accepted Answer

Glycogen – long-term energy storage in animals

Question 17

Which of the following best explains why lipids are used for waterproofing in living organisms?

Accepted Answer

Lipids are hydrophobic and repel water.

Question 18

Which of the following is a correct example of a monosaccharide?

Accepted Answer

Glucose

Question 19

Which of the following best describes the function of chitin in living organisms?

Accepted Answer

Structural support in fungal cell walls and arthropod exoskeletons

Question 20

A mutation causes an animal to be unable to produce phospholipids. Which cellular structure would be most directly affected?

Accepted Answer

Cell membrane

Organic Building Block Molecules: Carbohydrates and Lipids

Study Guide - Practice Questions