Question 1

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

Accepted Answer

An element is the simplest form of matter with unique chemical properties, while a compound consists of two or more elements chemically bonded together.

Question 2

Which mineral is most important for the structural integrity of bones and teeth?

Accepted Answer

Calcium (Ca)

Question 3

A patient is exposed to intense ionizing radiation. Which of the following is a direct hazard of this exposure?

Accepted Answer

Formation of free radicals that can damage molecules and cause genetic mutations

Question 4

Which statement about isotopes is correct?

Accepted Answer

Isotopes of an element have the same number of valence electrons and are chemically similar.

Question 5

A solution with a pH of 4.0 is how many times more acidic than a solution with a pH of 6.0?

Accepted Answer

100 times

Question 6

Which of the following best explains why water is considered the universal solvent in biological systems?

Accepted Answer

Water is polar and can dissolve many charged and polar substances.

Question 7

Which type of chemical bond is the strongest and involves the equal sharing of electrons between atoms?

Accepted Answer

Nonpolar covalent bond

Question 8

A patient is suffering from muscle cramps due to an electrolyte imbalance. Which property of electrolytes is most directly related to this symptom?

Accepted Answer

Electrolytes are important for nerve and muscle function due to their ability to conduct electrical currents.

Question 9

Which of the following is a correct representation of a decomposition reaction?

Accepted Answer

$$AB \rightarrow A + B$$

Question 10

Which of the following statements about ATP is correct?

Accepted Answer

ATP releases energy primarily when the third phosphate group is removed.

Question 11

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

A hydroxyl group and a hydrogen atom are removed from monomers to form a polymer and water.

Question 12

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

Accepted Answer

Catalysis of chemical reactions

Question 13

Which of the following is a correct description of a buffer?

Accepted Answer

A buffer is a chemical solution that resists changes in pH.

Question 14

Which of the following is true about the structure of phospholipids?

Accepted Answer

Phospholipids have two hydrophobic tails and one hydrophilic head.

Question 15

Which of the following best explains the difference between catabolism and anabolism?

Accepted Answer

Catabolism breaks down molecules and releases energy, while anabolism builds molecules and requires energy.

Question 16

Which of the following is a correct example of a reversible chemical reaction?

Accepted Answer

$$CO_2 + H_2O$$ \leftrightarrow H_2CO_3$$

Question 17

Which of the following is a property of enzymes?

Accepted Answer

Enzymes lower the activation energy required for a reaction.

Question 18

Which of the following is a correct formula for the general structure of a monosaccharide?

Accepted Answer

$$C_nH_{2n}O_n$$

Question 19

Which of the following statements about cholesterol is correct?

Accepted Answer

Cholesterol is a steroid that is important for nervous system function and membrane structure.

Question 20

A patient has a genetic mutation affecting the primary structure of a protein. Which level of protein structure is directly altered?

Accepted Answer

The sequence of amino acids encoded in the genes

Atoms, Ions, and Molecules: Foundations of Anatomy & Physiology

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