$$\text{ATP} + \text{H}_2\text{O} \rightarrow \text{ADP} + \text{P}_i + \text{ENERGY}$$

Question 1

Which of the following best describes the structure of an atom?

Accepted Answer

A nucleus containing protons and neutrons, surrounded by electrons in shells.

Question 2

If an atom has an atomic number of 8 and an atomic mass of 16, how many neutrons does it have?

Accepted Answer

$$16 - 8 = 8$$ neutrons

Question 3

Which statement is true of all atoms that are anions?

Accepted Answer

The atom has more electrons than protons.

Question 4

What is the maximum number of electrons that can occupy the second electron shell of an atom?

Accepted Answer

8

Question 5

Which of the following best describes an ionic bond?

Accepted Answer

An attraction between ions of opposite charge that hold them together to form a stable molecule.

Question 6

A sodium atom (Na) loses one electron to become Na+. What type of ion is Na+?

Accepted Answer

A cation

Question 7

Which of the following is a property of water that makes it essential for life?

Accepted Answer

It is a polar molecule, making it an excellent solvent.

Question 8

Which of the following equations represents a decomposition reaction?

Accepted Answer

$$AB \rightarrow A + B$$

Question 9

A solution has a pH of 3. How does its hydrogen ion concentration compare to a solution with pH 6?

Accepted Answer

It has $$10^{(6-3)} = 1000$ times more H$$^+$$ ions.

Question 10

Which of the following is a characteristic of organic compounds?

Accepted Answer

They contain both carbon and hydrogen.

Question 11

Which functional group is present in all amino acids?

Accepted Answer

Amino group ($$-NH_2$)

Question 12

Which of the following best describes a phospholipid?

Accepted Answer

A molecule with a glycerol backbone, two fatty acids, and a phosphate group.

Question 13

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

Accepted Answer

1:2:1

Question 14

Which of the following is NOT a component of a nucleotide?

Accepted Answer

Amino group

Question 15

Which type of chemical bond is primarily responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 16

What happens to ATP when it is hydrolyzed in the cell?

Accepted Answer

$$	ext{ATP} + 	ext{H}_2	ext{O} ightarrow 	ext{ADP} + 	ext{P}_i + 	ext{ENERGY}$$

Question 17

Which of the following best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water is polar and can surround both positive and negative ions, separating them.

Question 18

Which of the following is a real-life example of an exergonic reaction?

Accepted Answer

The breakdown of glucose during cellular respiration.

Question 19

Which of the following statements about hydrogen bonds is correct?

Accepted Answer

They are weak bonds that serve as bridges between molecules or parts of molecules.

Question 20

Which of the following best describes the difference between a monosaccharide and a polysaccharide?

Accepted Answer

A monosaccharide is a single simple sugar, while a polysaccharide is composed of many monosaccharides bonded together.

Chemical Principles for Microbiology: Atomic Structure, Bonds, and Biomolecules

Study Guide - Practice Questions