Question 1

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

Accepted Answer

Smaller cells have a higher surface area-to-volume ratio, which allows for more efficient exchange of nutrients and waste.

Question 2

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

Accepted Answer

Transmission electron microscope (TEM)

Question 3

Calculate the total magnification when using a 10x ocular lens and a 40x objective lens on a light microscope. Provide your answer as an equation.

Accepted Answer

$$10 	imes 40 = 400$$

Question 4

Which of the following is NOT a component found in all cells?

Accepted Answer

Nucleus

Question 5

A bacterial cell is observed to have a thick, jellylike outer coating. What is this structure called, and what is one of its possible functions?

Accepted Answer

Capsule; it can help the cell evade the immune system.

Question 6

Which organelle is responsible for modifying, packaging, and distributing proteins and lipids within a eukaryotic cell?

Accepted Answer

Golgi apparatus

Question 7

Which of the following statements supports the endosymbiont theory for the origin of mitochondria and chloroplasts?

Accepted Answer

Both organelles contain their own DNA and ribosomes.

Question 8

Which cytoskeletal element is primarily responsible for the movement of chromosomes during animal cell division?

Accepted Answer

Microtubules

Question 9

A mutation prevents the formation of nuclear pores in a eukaryotic cell. Which process would be most directly affected?

Accepted Answer

Transport of molecules between the nucleus and cytoplasm

Question 10

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

Accepted Answer

They digest and recycle cellular waste and foreign material.

Question 11

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

Accepted Answer

Central vacuole

Question 12

Which of the following structures is found in prokaryotic cells but NOT in eukaryotic cells?

Accepted Answer

Nucleoid

Question 13

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

Accepted Answer

It provides structural support and helps cells adhere to one another.

Question 14

Which of the following is a function of the smooth endoplasmic reticulum (SER)?

Accepted Answer

Synthesis of lipids and detoxification of toxins

Question 15

A cell is observed to have many cilia on its surface. What is the most likely function of these structures?

Accepted Answer

Movement of the cell or movement of fluid past the cell

Question 16

Which of the following equations correctly represents the calculation of the surface area-to-volume ratio for a cube-shaped cell with side length $$l$$?

Accepted Answer

$$\frac{6l^2$}{l^3$}$$

Question 17

Which of the following is a shared feature of both mitochondria and chloroplasts that supports their evolutionary origin?

Accepted Answer

Both contain their own circular DNA and ribosomes.

Question 18

Which of the following best describes the function of microfilaments in eukaryotic cells?

Accepted Answer

They support cell shape and are involved in muscle contraction and cell movement.

Question 19

A mutation causes a eukaryotic cell to lack functional peroxisomes. Which process would be most directly affected?

Accepted Answer

Breakdown of fatty acids and detoxification of poisons

Question 20

Which of the following best explains why mitochondria are often called the 'powerhouse of the cell'?

Accepted Answer

They convert chemical energy from food into ATP through cellular respiration.

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

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