Question 1

Which of the following best explains why cells are generally small in size?

Accepted Answer

Smaller cells have a higher surface area-to-volume ratio, which facilitates efficient exchange of materials with their environment.

Question 2

A scientist wants to observe the detailed internal structure of mitochondria. Which microscope should they use?

Accepted Answer

Transmission Electron Microscope (TEM)

Question 3

Which of the following is a key difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have their DNA enclosed in a nucleus, while prokaryotic cells have their DNA in a nucleoid region.

Question 4

If a cell's surface area is $$6 	imes 1^2$ = 6$$ and its volume is $$1^3 = 1$, what is its surface area-to-volume ratio?

Accepted Answer

$$6:1$$

Question 5

Which organelle is primarily responsible for synthesizing ATP in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 6

A mutation disrupts the function of the nuclear envelope. Which cellular process would be most directly affected?

Accepted Answer

Transport of RNA and proteins between the nucleus and cytoplasm

Question 7

Which of the following best describes the endosymbiotic theory for the origin of mitochondria and chloroplasts?

Accepted Answer

They evolved from free-living prokaryotes that were engulfed by ancestral eukaryotic cells.

Question 8

Which organelle is most directly involved in the detoxification of harmful substances in liver cells?

Accepted Answer

Smooth Endoplasmic Reticulum

Question 9

A plant cell is placed in a hypotonic solution. Which organelle helps prevent the cell from bursting?

Accepted Answer

Central vacuole

Question 10

Which cytoskeletal element is primarily responsible for chromosome movement during mitosis?

Accepted Answer

Microtubules

Question 11

Which structure connects adjacent plant cells and allows for the movement of water and small molecules between them?

Accepted Answer

Plasmodesmata

Question 12

A cell is observed to have a large number of ribosomes attached to its endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Synthesis of secreted proteins

Question 13

Which of the following is NOT a function of the Golgi apparatus?

Accepted Answer

Synthesis of ATP

Question 14

Which equation correctly represents the calculation of the volume of a cube-shaped cell with side length $$l$$?

Accepted Answer

$$V = l^3$

Question 15

Which of the following organelles contains its own DNA and ribosomes, supporting the endosymbiotic theory?

Accepted Answer

Mitochondrion

Question 16

Which extracellular structure in animal cells provides structural support and helps coordinate cellular activities?

Accepted Answer

Extracellular matrix

Question 17

A mutation in a motor protein prevents it from hydrolyzing ATP. Which cellular process would be most directly affected?

Accepted Answer

Movement of vesicles along microtubules

Question 18

Which of the following best describes the function of lysosomes?

Accepted Answer

Digestion and recycling of cellular waste

Question 19

Which of the following is a real-world application of electron microscopy?

Accepted Answer

Diagnosing viral infections by visualizing virus particles in patient samples

Question 20

Which of the following statements best summarizes the concept that 'a cell is greater than the sum of its parts'?

Accepted Answer

Cellular functions arise from the coordinated interactions of organelles and structures, not just their individual activities.

A Tour of the Cell: Chapter 6 Study Notes

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