Question 1

Which of the following is NOT a feature that supports the endosymbiotic theory for the origin of mitochondria and chloroplasts?

Accepted Answer

Their genomes are linear, like eukaryotic chromosomes.

Question 2

A scientist discovers a cell with the following characteristics: a nucleoid region, circular DNA, and no membrane-bound organelles. Which type of cell is this most likely to be?

Accepted Answer

A prokaryotic cell

Question 3

Which of the following best explains why eukaryotic cells can carry out more complex functions than prokaryotic cells?

Accepted Answer

Eukaryotic cells have compartmentalization via membrane-bound organelles.

Question 4

Which of the following proteins is LEAST likely to be synthesized by ribosomes on the rough endoplasmic reticulum (RER)?

Accepted Answer

A transcription factor that enters the nucleus of the same cell

Question 5

A cell is observed to engulf a large particle by extending its plasma membrane around it, forming a vesicle. Which process is being described?

Accepted Answer

Phagocytosis

Question 6

Which of the following correctly describes the path of a protein destined for secretion from a eukaryotic cell?

Accepted Answer

Rough ER → Transport vesicle → Golgi apparatus → Transport vesicle → Plasma membrane

Question 7

Which of the following statements about the plasma membrane is TRUE?

Accepted Answer

It allows selective permeability due to its phospholipid bilayer structure.

Question 8

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

Accepted Answer

Movement of vesicles along the cytoskeleton

Question 9

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

Accepted Answer

Eukaryotic cells have linear DNA contained within a nucleus.

Question 10

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

Accepted Answer

They contain hydrolytic enzymes for breaking down macromolecules.

Question 11

A cell is observed to take in specific molecules from its environment by forming a vesicle coated with proteins after the molecules bind to receptors. Which process is this?

Accepted Answer

Receptor-mediated endocytosis

Question 12

Which of the following is a real-world example of exocytosis?

Accepted Answer

A neuron releasing neurotransmitters into a synapse

Question 13

Which of the following statements about mitochondria is FALSE?

Accepted Answer

They are found only in plant cells.

Question 14

Which equation best represents the process of cellular respiration occurring in mitochondria?

Accepted Answer

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

Question 15

Which of the following best explains why the inner membrane of mitochondria is highly folded into cristae?

Accepted Answer

To provide more surface area for ATP-producing enzymes

Question 16

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

Accepted Answer

Providing structural support and facilitating movement of organelles

Question 17

A cell is placed in a solution and water moves into the cell, causing it to swell. Which type of solution is the cell in?

Accepted Answer

Hypotonic

Question 18

Which of the following statements about the endomembrane system is TRUE?

Accepted Answer

It is responsible for the synthesis, modification, and transport of proteins and lipids.

Question 19

Which of the following best describes the evolutionary advantage of compartmentalization in eukaryotic cells?

Accepted Answer

It enables specialized environments for different metabolic reactions.

Question 20

A researcher observes a eukaryotic cell with an unusually high number of peroxisomes. Which function is likely to be especially active in this cell?

Accepted Answer

Breakdown of fatty acids and detoxification of harmful substances

Cell Structure and Function: Foundations of Life

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