Question 1

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

Accepted Answer

Eukaryotic cells contain many membrane-bound organelles, whereas prokaryotic cells lack these structures.

Question 2

A scientist observes a cell with a thick cell wall containing peptidoglycan. Which type of organism is this cell most likely from?

Accepted Answer

Bacteria

Question 3

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

Accepted Answer

Rough endoplasmic reticulum (RER)

Question 4

A mutation disrupts the function of the enzyme catalase in a cell. Which organelle's activity would be most directly affected?

Accepted Answer

Peroxisome

Question 5

Which of the following best explains why the plasma membrane is described as 'selectively permeable'?

Accepted Answer

It regulates the movement of specific molecules in and out of the cell based on their properties.

Question 6

A cell is observed to have two membranes surrounding its organelle, and the organelle contains its own DNA. Which organelle is most likely being described?

Accepted Answer

Mitochondrion

Question 7

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Modifying, sorting, and packaging proteins for secretion

Question 8

Which cytoskeletal element is primarily responsible for guiding the movement of vesicles through the cell?

Accepted Answer

Microtubules

Question 9

A plant cell is observed to have a large central vacuole. What is the primary function of this organelle?

Accepted Answer

Storage of water and other substances

Question 10

Which of the following structures is found in animal cells but not in plant cells?

Accepted Answer

Desmosome

Question 11

Which process is most directly associated with the mitochondrion?

Accepted Answer

Cellular respiration

Question 12

A researcher uses transmission electron microscopy (TEM) to study a cell. What is the main advantage of TEM over scanning electron microscopy (SEM)?

Accepted Answer

TEM provides detailed images of the internal structure of the cell.

Question 13

Which of the following best describes the endosymbiotic theory?

Accepted Answer

Mitochondria and chloroplasts originated as independent prokaryotes that were engulfed by ancestral eukaryotic cells.

Question 14

Which of the following proteins is a major component of the extracellular matrix and provides structural support to animal tissues?

Accepted Answer

Collagen

Question 15

A cell is unable to produce secreted proteins. Which organelle is most likely malfunctioning?

Accepted Answer

Rough endoplasmic reticulum

Question 16

Which of the following junctions prevents the movement of substances between adjacent animal cells, forming a barrier?

Accepted Answer

Tight junction

Question 17

Which formula correctly represents the production of ATP during cellular respiration in mitochondria?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \mathrm{ATP}$$

Question 18

Which of the following statements about microtubules is correct?

Accepted Answer

Microtubules form tracks for vesicle movement and are made of tubulin.

Question 19

A cell is observed to have plasmodesmata. What does this indicate about the cell?

Accepted Answer

It is a plant cell.

Question 20

Which organelle contains enzymes that break down fatty acids and detoxify harmful substances?

Accepted Answer

Peroxisome

Cell Structure and Function: Prokaryotic and Eukaryotic Cells, Organelles, and the Cytoskeleton

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