Question 1

Which structure is highlighted in the first image, and what is its primary function in plant cells?

Accepted Answer

Plasmodesmata; allow direct cytoplasmic exchange between adjacent cells

Question 2

In the second image, which component is responsible for transmitting signals from the extracellular matrix to the cytoskeleton inside the cell?

Accepted Answer

Integrins

Question 3

The third image shows three types of cell junctions in animal tissues. Which junction prevents the passage of molecules between adjacent epithelial cells?

Accepted Answer

Tight junctions

Question 4

The fourth image depicts an organelle with stacked, flattened sacs. What is the main function of this organelle?

Accepted Answer

Modification, sorting, and packaging of proteins and lipids

Question 5

In the fifth image, vesicles are shown fusing with an organelle. What is the significance of the cis and trans faces of this organelle?

Accepted Answer

The cis face receives vesicles from the ER, and the trans face ships modified products to their destinations

Question 6

The sixth image illustrates the endomembrane system. Which sequence correctly describes the pathway of a secretory protein?

Accepted Answer

Rough ER → transport vesicle → Golgi apparatus → secretory vesicle → plasma membrane

Question 7

The seventh image shows a generalized animal cell. Which organelle is responsible for most of the cell's ATP production, and what is the main process occurring there?

Accepted Answer

Mitochondrion; cellular respiration

Question 8

The eighth image shows a plant cell. Which structure is unique to plant cells and is responsible for storing water, ions, and waste products?

Accepted Answer

Central vacuole

Question 9

Which of the following best explains why plant cells can withstand high internal pressure without bursting, as seen in the eighth image?

Accepted Answer

The presence of a rigid cell wall composed mainly of cellulose

Question 10

If a mutation disrupted the function of the organelle shown in the fourth and fifth images, which cellular process would be most directly affected?

Accepted Answer

Protein modification and trafficking

Question 11

Which of the following best describes the role of the extracellular matrix (ECM) as shown in the second image?

Accepted Answer

It provides structural support and mediates communication between cells and their environment

Question 12

Which cell junction, as shown in the third image, is most important for communication between adjacent animal cells?

Accepted Answer

Gap junctions

Question 13

A cell with abundant smooth endoplasmic reticulum (not shown directly in the images) is likely specialized for which function?

Accepted Answer

Synthesis of lipids and detoxification of drugs

Question 14

Which structure, visible in the seventh and eighth images, is present in both plant and animal cells and is the site of protein synthesis?

Accepted Answer

Ribosomes

Question 15

Which of the following statements best explains why mitochondria and chloroplasts are not considered part of the endomembrane system, as seen in the seventh and eighth images?

Accepted Answer

They have double membranes and their own DNA, supporting the endosymbiont theory

A Tour of the Cell: Structure, Function, and Organization

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