Question 1

Which of the following best describes the function of the plasma membrane in a typical human cell?

Accepted Answer

It separates the cytoplasm from the extracellular fluid and regulates exchange with the environment.

Question 2

A cell is placed in a hypotonic solution. What is the most likely outcome for the cell?

Accepted Answer

The cell will gain water and swell, possibly bursting.

Question 3

Which organelle is primarily responsible for the synthesis of proteins that are exported from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 4

What is the main structural component of the plasma membrane?

Accepted Answer

Phospholipid bilayer

Question 5

Which type of membrane protein is responsible for stabilizing the position of the cell membrane relative to the cytoskeleton and extracellular structures?

Accepted Answer

Anchoring proteins

Question 6

A patient is diagnosed with a genetic disorder affecting the glycocalyx of their cells. Which cellular function is most likely to be impaired?

Accepted Answer

Cell recognition and immune response

Question 7

Which of the following best explains why oxygen and carbon dioxide can diffuse directly through the plasma membrane?

Accepted Answer

They are small, nonpolar molecules.

Question 8

During protein synthesis, what is the correct sequence of events?

Accepted Answer

Transcription, translation, processing

Question 9

Which equation best represents the movement of water across a selectively permeable membrane due to osmosis?

Accepted Answer

$\Delta \Psi = \Psi_{inside} - \Psi_{outside}$

Question 10

A cell uses ATP to move sodium ions out and potassium ions in against their concentration gradients. Which process is this an example of?

Accepted Answer

Active transport via sodium-potassium pump

Question 11

Which organelle is responsible for packaging and modifying proteins for secretion?

Accepted Answer

Golgi apparatus

Question 12

If a cell's lysosomes are nonfunctional, which process will be most directly affected?

Accepted Answer

Intracellular digestion of waste and foreign material

Question 13

Which of the following best describes the role of the cytoskeleton?

Accepted Answer

It provides structural support and facilitates cell movement.

Question 14

A cell is observed to have a large number of microvilli. What is the most likely function of this cell?

Accepted Answer

Increased absorption of nutrients

Question 15

Which equation describes the rate of diffusion across a membrane according to Fick's Law?

Accepted Answer

$J = -D \frac{dC}{dx}$

Question 16

Which of the following is NOT a function of membrane carbohydrates such as glycoproteins and glycolipids?

Accepted Answer

Energy production

Question 17

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 18

Which process allows large molecules to enter the cell by engulfing them in a vesicle?

Accepted Answer

Endocytosis

Question 19

A mutation causes a cell to produce abnormal recognition proteins. What is a likely consequence?

Accepted Answer

The cell may be targeted by the immune system as abnormal.

Question 20

Which of the following best describes the difference between chromatin and chromosomes?

Accepted Answer

Chromatin is loosely coiled DNA during interphase; chromosomes are tightly coiled DNA during cell division.

The Cellular Level of Organization: Structure and Function of Cells

Study Guide - Practice Questions

Study Guide - Flashcards