Question 1

Which of the following is NOT a primary function of biological membranes as described in the study materials?

Accepted Answer

Generate electrical impulses

Question 2

A patient has a genetic disorder affecting the production of phospholipids. Which cellular structure would be most directly compromised?

Accepted Answer

Cell membrane

Question 3

Which of the following components is responsible for the selective permeability of the cell membrane?

Accepted Answer

Phospholipid bilayer

Question 4

A researcher is studying the movement of ions across a cell membrane. Which type of work is being performed?

Accepted Answer

Transport work

Question 5

Which of the following best describes the arrangement of phospholipids in the cell membrane?

Accepted Answer

Hydrophilic heads face outward, hydrophobic tails face inward

Question 6

Which organelle is primarily responsible for energy production in the cell?

Accepted Answer

Mitochondrion

Question 7

A cell is unable to synthesize proteins due to a malfunction in which organelle?

Accepted Answer

Ribosome

Question 8

Which of the following molecules contributes to the structural stability of the cell membrane?

Accepted Answer

Cholesterol

Question 9

If a cell's membrane loses its ability to communicate with extracellular stimuli, which component is most likely defective?

Accepted Answer

Membrane proteins

Question 10

Which equation best represents the energy change in a chemical reaction catalyzed by an enzyme?

Accepted Answer

$$\Delta G = G_{products} - G_{reactants}$$

Question 11

A cell is observed to have an increased number of lysosomes. What is the most likely reason for this adaptation?

Accepted Answer

Increased need for intracellular digestion

Question 12

Which of the following is NOT a component of the cell membrane?

Accepted Answer

DNA

Question 13

A mutation causes a cell to lack glycolipids in its membrane. Which function would be most affected?

Accepted Answer

Cell recognition and signaling

Question 14

Which tissue type is specialized for conducting electrical impulses?

Accepted Answer

Neural tissue

Question 15

Which of the following best describes the role of the pericardial membrane?

Accepted Answer

It surrounds and protects the heart

Question 16

Which equation describes the movement of molecules down their concentration gradient?

Accepted Answer

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

Question 17

A cell is exposed to a toxin that disrupts the cytoskeleton. Which process would be most directly affected?

Accepted Answer

Cell shape and movement

Question 18

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

Accepted Answer

Golgi apparatus

Question 19

Which of the following is a real-life example of mechanical work performed by cells?

Accepted Answer

Contraction of muscle fibers during exercise

Question 20

Which of the following statements about smooth muscle is TRUE?

Accepted Answer

It can replicate and undergo hyperplasia

Cellular Membranes: Structure, Function, and Organization

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