Question 1

Which of the following provides the strongest evidence supporting the endosymbiotic theory for the origin of mitochondria and chloroplasts in eukaryotic cells?

Accepted Answer

Both organelles contain circular DNA and 70S ribosomes, similar to bacteria.

Question 2

A patient is diagnosed with a yeast infection caused by Candida albicans after taking antibiotics for pneumonia. Which of the following best explains why the antibiotics did not prevent the yeast infection?

Accepted Answer

Antibiotics only target prokaryotic cells, not eukaryotic cells like fungi.

Question 3

Which of the following statements correctly compares mitosis and meiosis in eukaryotic cells?

Accepted Answer

Mitosis produces two genetically identical cells, while meiosis produces four genetically diverse gametes.

Question 4

Which of the following transport mechanisms is unique to eukaryotic cells and requires energy?

Accepted Answer

Endocytosis

Question 5

A cell engulfs a large, undissolved particle by wrapping its plasma membrane around it and forming a vesicle. This process is best described as:

Accepted Answer

Phagocytosis

Question 6

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

Accepted Answer

Maintaining cell shape and facilitating intracellular transport

Question 7

Which of the following statements about eukaryotic plasma membranes is correct?

Accepted Answer

They are composed of a phospholipid bilayer with embedded sterols.

Question 8

Which of the following best describes the role of clathrin in receptor-mediated endocytosis?

Accepted Answer

Clathrin forms a protein coat that helps shape the vesicle during endocytosis.

Question 9

Which of the following eukaryotic kingdoms contains organisms that are all multicellular and carry out photosynthesis?

Accepted Answer

Plants

Question 10

Which of the following is a distinguishing feature of fungal cell walls compared to plant cell walls?

Accepted Answer

Fungal cell walls contain chitin, while plant cell walls contain cellulose.

Question 11

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

Accepted Answer

It is the site of ribosome assembly.

Question 12

A scientist observes a unicellular organism with cilia and a nucleus. Which kingdom is this organism most likely classified under?

Accepted Answer

Protista

Question 13

Which of the following is NOT a characteristic shared by mitochondria and bacteria?

Accepted Answer

Presence of a peptidoglycan cell wall

Question 14

Which of the following best explains why aflatoxin produced by Aspergillus flavus is a public health concern?

Accepted Answer

It is a potent carcinogen and mutagen that can contaminate food supplies.

Question 15

Which of the following protozoan groups is correctly matched with its mode of movement?

Accepted Answer

Ciliated protozoans – cilia

Question 16

Which of the following is a function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Modifying, sorting, and packaging proteins for secretion or delivery to other organelles

Question 17

A cell is placed in a hypertonic solution. What will most likely happen to an animal cell in this environment?

Accepted Answer

It will lose water and shrink.

Question 18

Which of the following best describes the difference between free and bound ribosomes in eukaryotic cells?

Accepted Answer

Bound ribosomes are attached to the rough ER and synthesize proteins for export, while free ribosomes synthesize proteins for use within the cytosol.

Question 19

Which of the following is a correct statement about the structure of eukaryotic flagella?

Accepted Answer

They are composed of tubulin arranged in a 9+2 microtubule pattern.

Question 20

Which of the following best describes the function of contractile vacuoles in some protists?

Accepted Answer

They regulate osmotic pressure to prevent cell lysis in hypotonic environments.

Introduction to Eukaryotic Cells: Structure, Function, and Diversity

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