Question 1

Which of the following best explains why cells are limited in size by the surface area to volume ratio?

Accepted Answer

As cells grow larger, their volume increases faster than their surface area, making it harder for the cell to efficiently exchange materials with its environment.

Question 2

A scientist observes a cell with a nucleus, mitochondria, and chloroplasts. Which type of cell is she most likely observing?

Accepted Answer

Eukaryotic plant cell

Question 3

Which organelle is primarily responsible for cellular respiration?

Accepted Answer

Mitochondrion

Question 4

A cell is observed to have ribosomes attached to its endoplasmic reticulum. What is the main function of this organelle?

Accepted Answer

Protein synthesis and processing

Question 5

Which of the following equations correctly represents the surface area to volume ratio for a spherical cell of radius $$r$$?

Accepted Answer

$$\frac{4 \pi r^2$}{\frac{4}{3} \pi r^3$}$$

Question 6

Which structure is found in both prokaryotic and eukaryotic cells and is responsible for protein synthesis?

Accepted Answer

Ribosome

Question 7

A patient is diagnosed with Tay-Sachs disease, which affects the function of which cellular organelle?

Accepted Answer

Lysosome

Question 8

Which of the following best describes the function of the plasma membrane?

Accepted Answer

It selectively regulates the movement of substances into and out of the cell.

Question 9

Which of the following is NOT a feature of prokaryotic cells?

Accepted Answer

Nucleus

Question 10

A researcher uses an electron microscope to study cell organelles. What advantage does this microscope have over a light microscope?

Accepted Answer

It provides much higher resolution, allowing visualization of smaller structures.

Question 11

Which organelle is responsible for packaging and modifying proteins for secretion?

Accepted Answer

Golgi apparatus

Question 12

Which of the following structures is unique to plant cells and is the site of photosynthesis?

Accepted Answer

Chloroplast

Question 13

Which cellular structure is involved in autophagy, the process of breaking down and recycling cellular components?

Accepted Answer

Lysosome

Question 14

Which of the following best describes the role of the extracellular matrix in animal cells?

Accepted Answer

It provides structural support and helps regulate cell behavior.

Question 15

Which of the following is a function of microtubules in eukaryotic cells?

Accepted Answer

Providing tracks for organelle movement and forming the mitotic spindle during cell division

Question 16

A cell is observed to have a cell wall, plasma membrane, and ribosomes, but no nucleus. What type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 17

Which of the following correctly matches the organelle with its function?

Accepted Answer

Lysosome – digestion of macromolecules

Question 18

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

Accepted Answer

Eukaryotic cells have a nucleus, while prokaryotic cells do not.

Question 19

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

Accepted Answer

Transport of RNA and other molecules between the nucleus and cytoplasm

Question 20

Which of the following best describes the function of centrioles in animal cells?

Accepted Answer

They help organize microtubules during cell division.

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

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