Question 1

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

Accepted Answer

A compound involves chemical bonding between its components and is always homogeneous, while a mixture does not involve chemical bonding and can be heterogeneous or homogeneous.

Question 2

A patient is exposed to a radioisotope for medical imaging. Which property of radioisotopes makes them useful for this purpose, and what is a potential risk?

Accepted Answer

Radioisotopes emit radiation that can be detected for imaging, but all radioactivity can damage living tissue.

Question 3

Which of the following elements is most abundant in the human body by mass and is essential for cellular energy production?

Accepted Answer

Oxygen

Question 4

A molecule of water (H$$_2O) is $$described as having polar covalent bonds. What does this mean?

Accepted Answer

The oxygen atom attracts electrons more strongly, creating partial charges on the molecule.

Question 5

Which of the following best explains why water is an effective coolant for the human body?

Accepted Answer

Water has a high heat of vaporization, requiring large amounts of heat to evaporate.

Question 6

A solution has a pH of 3. Which of the following statements is true about this solution?

Accepted Answer

It is acidic and has a high concentration of H$$^+$$ ions.

Question 7

Which of the following chemical bonds is the strongest?

Accepted Answer

Covalent bond

Question 8

A protein is exposed to high heat and extreme pH, causing it to lose its three-dimensional structure and function. This process is called:

Accepted Answer

Denaturation

Question 9

Which of the following is a correct representation of a redox reaction occurring in cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP$$

Question 10

Which property of water allows it to dissolve ionic substances and form hydration layers around large charged molecules?

Accepted Answer

Polar solvent properties

Question 11

A buffer system in the blood helps maintain pH by:

Accepted Answer

Releasing hydrogen ions when pH rises and binding them when pH falls.

Question 12

Which of the following factors will increase the rate of a chemical reaction in the human body?

Accepted Answer

Decreasing particle size

Question 13

Which of the following statements about ATP is correct?

Accepted Answer

ATP is a nucleotide that stores chemical energy for cellular work.

Question 14

Which of the following is a polymer made up of amino acid monomers?

Accepted Answer

Protein

Question 15

A molecule of sodium chloride (NaCl) dissolves in water and separates into Na$$^+$$ and Cl$$^-$$ ions. What type of compound is NaCl and what property does it exhibit in solution?

Accepted Answer

It is an inorganic compound and acts as an electrolyte.

Question 16

Which of the following best describes the octet rule in chemical bonding?

Accepted Answer

Atoms tend to have 8 electrons in their valence shell, except hydrogen and helium.

Question 17

Which of the following is a correct statement about enzymes?

Accepted Answer

Enzymes are proteins that speed up chemical reactions without being consumed.

Question 18

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

Accepted Answer

A molecule composed of glycerol, two fatty acids, and a phosphorus-containing group.

Question 19

Which of the following statements about nucleic acids is true?

Accepted Answer

DNA holds the genetic blueprint for protein synthesis and is double-stranded.

Chemistry Comes Alive: Foundations for Anatomy & Physiology

Study Guide - Practice Questions

Study Guide - Flashcards