$\text{Monomer} + \text{Monomer} \rightarrow \text{Polymer} + H_2O$

Question 1

Which of the following statements best describes the difference between organic and inorganic molecules in the human body?

Accepted Answer

Organic molecules always contain carbon and hydrogen, while inorganic molecules may lack carbon.

Question 2

Water is considered a universal solvent in biological systems. Which property of water allows it to dissolve ionic and polar substances?

Accepted Answer

Its polarity, due to the unequal sharing of electrons between hydrogen and oxygen

Question 3

Which chemical reaction is responsible for breaking down polymers into monomers in biological systems?

Accepted Answer

Hydrolysis

Question 4

A student mixes table salt (NaCl) into water and observes it dissolving. Which property of water is most responsible for this observation?

Accepted Answer

Water's ability to form hydrogen bonds with ions

Question 5

Which of the following is an example of a biological macromolecule that is a polymer?

Accepted Answer

DNA

Question 6

During dehydration synthesis, which equation correctly represents the formation of a polymer from two monomers?

Accepted Answer

$	ext{Monomer} + 	ext{Monomer} ightarrow 	ext{Polymer} + H_2O$

Question 7

Which carbohydrate is the main energy source for most cells and can be stored in the liver and skeletal muscle as glycogen?

Accepted Answer

Glucose

Question 8

A patient is experiencing dehydration. Which property of water is most relevant to the body's ability to regulate temperature during this condition?

Accepted Answer

Water's high heat capacity

Question 9

Which type of lipid is characterized by having one or more double bonds in its fatty acid chains, making it liquid at room temperature?

Accepted Answer

Polyunsaturated fatty acids

Question 10

Which of the following best explains why phospholipids are essential for cell membrane structure?

Accepted Answer

They are amphipathic, with hydrophilic heads and hydrophobic tails, allowing formation of bilayers.

Question 11

A protein loses its tertiary structure when exposed to high heat. What is the most likely consequence for its function?

Accepted Answer

It will lose its specific biological activity due to denaturation.

Question 12

Which protein structure level is achieved when multiple polypeptide chains, each with its own tertiary structure, combine?

Accepted Answer

Quaternary structure

Question 13

Which of the following is a correct example of a hydrolysis reaction in carbohydrate metabolism?

Accepted Answer

$C_{12}H_{22}O_{11} + H_2O \rightarrow 2C_6H_{12}O_6$

Question 14

Which of the following is NOT a function of proteins in the human body?

Accepted Answer

Storing genetic information

Question 15

A triglyceride is formed by the reaction of which molecules?

Accepted Answer

Three fatty acids and one glycerol

Question 16

Which of the following best describes the role of ATP in cellular metabolism?

Accepted Answer

ATP is the main energy currency, releasing energy when phosphate bonds are broken.

Question 17

Which of the following statements about nucleic acids is correct?

Accepted Answer

Nucleic acids store and transfer genetic information.

Question 18

Which of the following is a correct description of an amphipathic molecule?

Accepted Answer

It has both hydrophilic and hydrophobic regions.

Question 19

Which process is responsible for the breakdown of glycogen into glucose in the liver during fasting?

Accepted Answer

Hydrolysis

Biological Macromolecules and Water: Structure, Function, and Importance in Anatomy & Physiology

Study Guide - Practice Questions