Question 1

Which property of water allows it to moderate Earth's climate and maintain stable temperatures in living organisms?

Accepted Answer

Its high heat of vaporization

Question 2

A patient is given an intravenous solution that is hypertonic relative to their blood plasma. What will most likely happen to their red blood cells?

Accepted Answer

The cells will shrink as water leaves the cells.

Question 3

Which of the following best explains why enzymes are highly specific for their substrates?

Accepted Answer

The active site of an enzyme has a unique three-dimensional shape that fits only specific substrates.

Question 4

Which of the following statements about ATP is correct?

Accepted Answer

ATP stores energy in the bonds between its phosphate groups.

Question 5

A scientist observes a cell with a nucleus, mitochondria, and chloroplasts. Which type of cell is being observed?

Accepted Answer

A plant cell

Question 6

Which of the following best describes the main difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus, prokaryotic cells do not.

Question 7

Which of the following organic molecules is correctly matched with its function?

Accepted Answer

Lipids: form the main structure of cell membranes

Question 8

A cell is placed in a solution and water moves into the cell by osmosis. Which equation best describes the movement of water?

Accepted Answer

$$ \Psi_{water}  is $$higher outside the cell than inside

Question 9

Which process requires energy input from the cell and moves substances against their concentration gradient?

Accepted Answer

Active transport

Question 10

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

Accepted Answer

Synthesizing proteins

Question 11

A mutation causes a cell to lack tight junctions. Which tissue function would be most directly affected?

Accepted Answer

The ability to prevent leakage of extracellular fluid between cells

Question 12

Which of the following best explains why viruses are not considered living organisms?

Accepted Answer

They cannot reproduce independently without a host cell.

Question 13

Which of the following best describes the role of weak interactions (such as hydrogen bonds) in biological systems?

Accepted Answer

They allow for dynamic and reversible interactions essential for biological processes.

Question 14

Which of the following scenarios illustrates the function of exocytosis?

Accepted Answer

A neuron releasing neurotransmitters into a synaptic cleft

Question 15

Which equation correctly represents the hydrolysis of ATP?

Accepted Answer

$$ \mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy} $$

Question 16

A cell with a defective sodium-potassium pump would have difficulty maintaining which of the following?

Accepted Answer

A high concentration of potassium ions inside the cell

Question 17

Which of the following best describes facilitated diffusion?

Accepted Answer

Movement of molecules down their concentration gradient through a membrane protein

Question 18

Which of the following is a key difference between plant and animal cells?

Accepted Answer

Animal cells have centrioles, plant cells usually do not.

Question 19

Which of the following best explains why cells are typically small in size?

Accepted Answer

To maximize the surface area-to-volume ratio for efficient exchange of materials

Question 20

A patient has a genetic disorder that prevents the formation of gap junctions. Which process would be most directly affected?

Accepted Answer

The ability of cells to communicate directly with neighboring cells

Foundations of the Chemistry of Life and Cell Structure

Study Guide - Practice Questions