Q: A solution has a pH of 4. What is the concentration of hydrogen ions $$[H^+] in $$moles per liter?

$$[H^+] = 1 \times 10$$^{-4}$$ M

Q: Which of the following is a correct example of a synthesis (anabolic) reaction?

$$\text{Amino acids} \rightarrow \text{Protein molecule}$$

Question 1

Which of the following best describes the difference between a molecule and a compound?

Accepted Answer

A molecule is a general term for two or more atoms bonded together, while a compound is a molecule that contains at least two different kinds of atoms.

Question 2

Which of the following is an example of a suspension?

Accepted Answer

Blood with settled red blood cells

Question 3

A solution has a pH of 4. What is the concentration of hydrogen ions $$[H^+] in $$moles per liter?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-4}$$ M

Question 4

Which of the following best explains why water is an excellent solvent for ionic compounds?

Accepted Answer

Water forms hydration layers around ions due to its polarity, separating and surrounding them.

Question 5

Which of the following statements about energy is correct?

Accepted Answer

Kinetic energy is energy in action, while potential energy is stored energy.

Question 6

A sodium atom (Na) loses one electron to become Na$$^+. $$What type of bond will it most likely form with a chlorine atom (Cl) that gains an electron?

Accepted Answer

Ionic bond

Question 7

Which of the following is true regarding isotopes?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 8

Which of the following best describes a polar covalent bond?

Accepted Answer

Electrons are shared unequally, resulting in partial charges on the atoms.

Question 9

Which of the following is a correct example of a synthesis (anabolic) reaction?

Accepted Answer

$$	ext{Amino acids} ightarrow 	ext{Protein molecule}$$

Question 10

Which of the following is NOT a property of water that makes it vital for life?

Accepted Answer

Nonpolar solvent properties

Question 11

Which of the following best describes the role of buffers in biological systems?

Accepted Answer

Buffers resist abrupt changes in pH by releasing or binding hydrogen ions.

Question 12

Which of the following is a correct statement about enzymes?

Accepted Answer

Enzymes lower the activation energy required for a reaction.

Question 13

Which of the following best explains why saturated fatty acids are solid at room temperature?

Accepted Answer

They have all single bonds, allowing molecules to pack closely together.

Question 14

Which of the following is a function of eicosanoids in the body?

Accepted Answer

Blood clotting and inflammation

Question 15

Which of the following best describes the quaternary structure of a protein?

Accepted Answer

The interaction of two or more polypeptide chains to form a functional protein

Question 16

Which of the following is true about ATP?

Accepted Answer

ATP directly powers chemical reactions in cells by transferring its terminal phosphate group.

Question 17

Which of the following is a correct example of a redox reaction in the body?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP}$$, where glucose is oxidized and oxygen is reduced.

Question 18

Which of the following is a property of fibrous proteins?

Accepted Answer

They provide mechanical support and tensile strength.

Question 19

Which of the following best describes the composition of a nucleotide?

Accepted Answer

A nitrogen base, a pentose sugar, and a phosphate group

Question 20

Which of the following is true about the pH scale?

Accepted Answer

A solution with pH 5 has a higher concentration of $$[H^+]$$ than a solution with pH 9.

A&P1 Chemistry: Foundations for Anatomy & Physiology

Study Guide - Practice Questions

Study Guide - Flashcards