Question 1

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

Accepted Answer

It regulates ion, nutrient, and signal exchange between the cell and its environment.

Question 2

A patient is diagnosed with a lysosomal storage disease. Which cellular process is most likely impaired?

Accepted Answer

Breakdown of cellular debris and fatty acids

Question 3

Which organelle is primarily responsible for ATP production through oxidative phosphorylation?

Accepted Answer

Mitochondrion

Question 4

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

Accepted Answer

S phase

Question 5

A mutation causes a cell to lose the ability to undergo apoptosis. What is a likely consequence?

Accepted Answer

Uncontrolled cell growth and potential tumor formation

Question 6

Which of the following best explains why carrier-mediated facilitated diffusion is considered passive transport?

Accepted Answer

It moves molecules down their concentration gradient without energy input.

Question 7

A cell is placed in a hypertonic solution. What will happen to the cell?

Accepted Answer

It will shrink as water leaves the cell.

Question 8

Which equation best represents the net movement of water across a semipermeable membrane due to osmosis?

Accepted Answer

$$J = -P (C_2$ - C_1$)$$

Question 9

Which process is responsible for the synthesis of proteins from mRNA?

Accepted Answer

Translation

Question 10

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

Accepted Answer

Membrane potential

Question 11

Which of the following is a function of peroxisomes in human cells?

Accepted Answer

Break down fatty acids and neutralize toxins

Question 12

Which of the following best describes the difference between somatic and sex cells?

Accepted Answer

Somatic cells carry out most body functions, sex cells are involved in reproduction.

Question 13

Which of the following is NOT a function of the cytoskeleton?

Accepted Answer

Synthesizing proteins

Question 14

A researcher observes a cell undergoing telophase. Which process is most likely occurring?

Accepted Answer

Reformation of nuclear envelopes around separated chromosomes

Question 15

Which of the following best describes the role of cholesterol in the plasma membrane?

Accepted Answer

It increases membrane fluidity and stability.

Question 16

A cell is observed to have many rough endoplasmic reticulum (RER). What is its likely function?

Accepted Answer

Protein synthesis for export

Question 17

Which of the following best explains why cancer cells can divide uncontrollably?

Accepted Answer

They have mutations in genes regulating the cell cycle (oncogenes).

Question 18

Which equation represents the relationship between membrane potential and ion concentration gradients?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[C_{out}]}{[C_{in}]} \right)$$

Question 19

Which process involves the movement of large particles into the cell via vesicle formation?

Accepted Answer

Endocytosis

Question 20

If a cell's DNA is damaged by radiation, which cellular process is most likely to be activated to prevent the propagation of mutations?

Accepted Answer

Apoptosis

Cellular Level of Organization: Study Notes for Anatomy & Physiology

Study Guide - Practice Questions