Question 1

Which of the following best describes the difference between ionic and covalent bonds in chemical compounds?

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, resulting in charged ions, while covalent bonds involve the sharing of electrons between atoms.

Question 2

A patient is suffering from dehydration. Which property of water is most important in helping maintain their body temperature during this condition?

Accepted Answer

Water's high heat of vaporization.

Question 3

Which of the following equations correctly represents the dissociation of a strong acid in water?

Accepted Answer

$$\mathrm{HA} \rightarrow \mathrm{H}^+ + \mathrm{A}^-$$

Question 4

Which of the following best explains why phospholipids are critical for plasma membrane structure?

Accepted Answer

Phospholipids have hydrophilic heads and hydrophobic tails, creating a bilayer that separates internal and external environments.

Question 5

A solution has a pH of 4. Which of the following statements is correct?

Accepted Answer

The solution is acidic and has a high concentration of H+ ions.

Question 6

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 \rightarrow \mathrm{C}_{12}\mathrm{H}_{22}\mathrm{O}_{11} + \mathrm{H}_2\mathrm{O}$$

Question 7

Which of the following best describes the role of enzymes in biological reactions?

Accepted Answer

Enzymes decrease the activation energy, speeding up the rate of chemical reactions.

Question 8

A cell is placed in a solution and water moves into the cell by osmosis. What type of solution is the cell in?

Accepted Answer

Hypotonic

Question 9

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizing proteins for cellular use

Question 10

Which of the following correctly matches the protein type with its function in the plasma membrane?

Accepted Answer

Globular proteins function as channels and carriers for transport.

Question 11

Which of the following cell junctions allows for the direct passage of ions and small molecules between adjacent cells?

Accepted Answer

Gap junctions

Question 12

Which of the following is a correct sequence of protein structure levels from simplest to most complex?

Accepted Answer

Primary, secondary, tertiary, quaternary

Question 13

Which of the following is a correct example of a hydrolysis reaction?

Accepted Answer

$$\mathrm{C}_{12}\mathrm{H}_{22}\mathrm{O}_{11} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6$$

Question 14

Which of the following best describes the function of ATP in cells?

Accepted Answer

ATP provides energy for cellular processes by releasing a phosphate group.

Question 15

Which of the following is a property of saturated triglycerides?

Accepted Answer

They are typically solid at room temperature.

Question 16

Which of the following is a correct description of passive transport across the plasma membrane?

Accepted Answer

Movement of substances down their concentration gradient without energy input.

Question 17

Which of the following is a correct example of a salt dissociating in water?

Accepted Answer

$$\mathrm{NaCl} \rightarrow \mathrm{Na}^+ + \mathrm{Cl}^-$$

Question 18

Which of the following is a correct statement about monomers and polymers?

Accepted Answer

Polymers are formed by joining monomers through dehydration synthesis.

Question 19

Which of the following is a correct example of a base dissociating in water?

Accepted Answer

$$\mathrm{NaOH} \rightarrow \mathrm{Na}^+ + \mathrm{OH}^-$$

Question 20

Which of the following would most likely increase the rate of a chemical reaction in the human body?

Accepted Answer

Increasing the concentration of reactants and adding enzymes.

Foundations of Chemistry and Cell Biology for Anatomy & Physiology

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