Question 1

Which of the following statements best explains why lipids are not considered true polymers?

Accepted Answer

Lipids are not composed of repeating monomer units linked by covalent bonds.

Question 2

A dehydration reaction is used to join two glucose molecules. What is the chemical formula for the resulting disaccharide, maltose?

Accepted Answer

$$\mathrm{C$$_{12}$$H_{22}O$$_{11}}$

Question 3

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

Accepted Answer

Starch is a storage polysaccharide with alpha glycosidic linkages, while cellulose is a structural polysaccharide with beta glycosidic linkages.

Question 4

How many molecules of water are required to completely hydrolyze a polymer that is ten monomers long?

Accepted Answer

$$9$$

Question 5

Which of the following is a function of adipose tissue in mammals?

Accepted Answer

Cushioning vital organs and insulating the body

Question 6

Which of the following best explains why trans fats are considered unhealthy?

Accepted Answer

They are artificially produced and contribute to coronary heart disease.

Question 7

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

Accepted Answer

Storing and transmitting genetic information

Question 8

Which of the following statements about phospholipids is correct?

Accepted Answer

They are major components of cell membranes due to their amphipathic nature.

Question 9

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

Accepted Answer

Enzymes act as catalysts, speeding up both dehydration and hydrolysis reactions.

Question 10

Which of the following is a correct pairing of a biological macromolecule and its monomer?

Accepted Answer

Carbohydrate – Monosaccharide

Question 11

A person with lactose intolerance is unable to digest lactose because they lack which of the following?

Accepted Answer

The enzyme lactase

Question 12

Which of the following statements about glycogen is true?

Accepted Answer

It is an extensively branched glucose polymer found in animal cells.

Question 13

Which of the following best explains why human sex hormones are considered lipids?

Accepted Answer

They are hydrophobic molecules derived from cholesterol.

Question 14

Which of the following is a real-life example of hydrolysis?

Accepted Answer

The digestion of starch into glucose molecules in the human intestine

Question 15

Which of the following best describes the structure of a steroid?

Accepted Answer

A carbon skeleton consisting of four fused rings

Question 16

Which of the following is a key difference between saturated and unsaturated fatty acids?

Accepted Answer

Unsaturated fatty acids have one or more double bonds, causing kinks in the chain.

Question 17

Which of the following is a function of chitin?

Accepted Answer

Structural support in fungal cell walls and arthropod exoskeletons

Question 18

Which of the following best describes the amphipathic nature of phospholipids?

Accepted Answer

They have both hydrophilic heads and hydrophobic tails.

Question 19

Which of the following is a correct description of a condensation (dehydration) reaction?

Accepted Answer

A reaction that connects monomers by removing a water molecule.

Question 20

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

Accepted Answer

Most animals lack enzymes that can hydrolyze beta glycosidic linkages.

Macromolecules: Structure, Function, and Diversity of Biological Molecules

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