Question 1

Which of the following best describes a polymer in biological systems?

Accepted Answer

A large molecule made up of many similar or identical building blocks called monomers.

Question 2

During the formation of a protein polymer, which type of reaction occurs between amino acid monomers?

Accepted Answer

Dehydration reaction

Question 3

What is released as a byproduct when two monomers are joined by a dehydration reaction?

Accepted Answer

A water molecule ($H_2O$)

Question 4

Which of the following statements about hydrolysis is correct?

Accepted Answer

Hydrolysis breaks polymers into monomers by adding a water molecule.

Question 5

Which of the following is NOT a biological macromolecule?

Accepted Answer

Water

Question 6

Which of the following is a monomer of carbohydrates?

Accepted Answer

Glucose

Question 7

In aqueous solutions, sugars often form ring structures. What determines whether a sugar is classified as a hexose or a pentose?

Accepted Answer

The number of carbon atoms in the molecule

Question 8

Which type of bond links two monosaccharides together in a disaccharide?

Accepted Answer

Glycosidic linkage ($C-O-C$)

Question 9

Which polysaccharide is used for energy storage in animals and is highly branched?

Accepted Answer

Glycogen

Question 10

Why can't most animals digest cellulose, even though it is made of glucose monomers?

Accepted Answer

Because the glycosidic linkages in cellulose are different from those in starch and glycogen.

Question 11

Which of the following best explains why olive oil remains liquid at room temperature while butter is solid?

Accepted Answer

Olive oil contains more unsaturated fatty acids, which have kinks in their tails preventing tight packing.

Question 12

Which of the following is a correct statement about the structure of lipids in biological membranes?

Accepted Answer

Phospholipids have hydrophilic head groups facing outward and hydrophobic tails facing inward.

Question 13

A mutation changes a single amino acid in a protein found in a barracuda species, allowing it to survive in colder waters. This is an example of:

Accepted Answer

How different configurations of polymers can lead to emergent properties and adaptation.

Question 14

Which of the following is true about saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids have only single bonds in their hydrocarbon tails, while unsaturated fatty acids have one or more double bonds.

Question 15

Which of the following equations correctly represents the dehydration reaction between two glucose molecules to form maltose?

Accepted Answer

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

Question 16

Which of the following is a real-world consequence of the structure of phospholipids?

Accepted Answer

They spontaneously form bilayers in water, creating cell membranes.

Question 17

Which of the following is a correct statement about polysaccharides?

Accepted Answer

Polysaccharides can be used for both energy storage and structural support in organisms.

Question 18

A student mixes butter and olive oil and places the mixture in the refrigerator. What is the most likely outcome, based on the chemical properties of the lipids?

Accepted Answer

The butter will become firmer while the olive oil remains liquid due to differences in saturation.

Question 19

Which of the following best explains why starch and cellulose, both made of glucose, have different properties?

Accepted Answer

They differ in the type of glycosidic linkages between glucose monomers.

Macromolecules and Polymers in Biology: Structure, Formation, and Function

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