Q: Which equation best represents the movement of water during osmosis?

$$\text{Water moves from an area of low solute concentration to high solute concentration}$$

Question 1

Which organelle is primarily responsible for producing ATP, the main energy currency of the cell?

Accepted Answer

Mitochondria

Question 2

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

Accepted Answer

It will shrink as water leaves the cell to balance solute concentrations.

Question 3

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

Shipping and modifying proteins and lipids

Question 4

Which component of the plasma membrane is most responsible for maintaining membrane fluidity?

Accepted Answer

Cholesterol

Question 5

A patient is given an intravenous solution that is hypotonic compared to their blood plasma. What is the most likely effect on their red blood cells?

Accepted Answer

Cells will swell and may burst due to water influx.

Question 6

Which organelle is responsible for breaking down waste materials and cellular debris?

Accepted Answer

Lysosome

Question 7

What is the main difference between simple diffusion and facilitated diffusion across the plasma membrane?

Accepted Answer

Facilitated diffusion requires a protein channel, while simple diffusion does not.

Question 8

Which of the following is a function of the cytoskeleton?

Accepted Answer

Maintaining cell shape and enabling movement

Question 9

If a cell's tumor suppressor genes are mutated, what is the most likely outcome?

Accepted Answer

The cell will divide uncontrollably, potentially leading to cancer.

Question 10

Which process uses vesicles to move large molecules out of the cell?

Accepted Answer

Exocytosis

Question 11

A drug acts as an antagonist to a membrane receptor. What is its most likely effect?

Accepted Answer

It blocks the receptor, preventing the natural ligand from binding.

Question 12

Which equation best represents the movement of water during osmosis?

Accepted Answer

$$	ext{Water moves from an area of low solute concentration to high solute concentration}$$

Question 13

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

Accepted Answer

Interphase

Question 14

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

Accepted Answer

Synthesizing proteins

Question 15

A cell is actively transporting sodium ions out of the cell against their concentration gradient. Which equation best describes the energy requirement for this process?

Accepted Answer

$$\Delta G = RT \ln \left( \frac{[Na^+]_{out}}{[Na^+]_{in}} \right)$$

Question 16

Which organelle is the site of lipid synthesis and detoxification?

Accepted Answer

Smooth endoplasmic reticulum

Question 17

What would most likely happen if a cell's ribosomes were nonfunctional?

Accepted Answer

The cell would be unable to synthesize proteins.

Question 18

Which of the following best describes the role of glycolipids and glycoproteins in the plasma membrane?

Accepted Answer

They are involved in cell recognition and immunity.

Question 19

Which type of cell junction is most important for preventing substances from passing between cells in epithelial tissue?

Accepted Answer

Tight junctions

Question 20

Which of the following best explains why sports drinks are often isotonic?

Accepted Answer

They have solute concentrations similar to blood plasma, preventing rapid cell swelling or shrinking.

Chapter 3: Cells – Structure, Function, and Division

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