Question 1

Which of the following statements best describes the endosymbiotic theory as it relates to the evolution of eukaryotic cells?

Accepted Answer

Eukaryotic cells evolved from a series of cell-merging events between an ancient eukaryotic ancestor and certain prokaryotes.

Question 2

Which of the following features is NOT evidence supporting the endosymbiotic origin of mitochondria and chloroplasts?

Accepted Answer

They are surrounded by a single membrane.

Question 3

A scientist observes a eukaryotic cell that lacks a cell wall, contains multiple linear chromosomes, and has 80S ribosomes in the cytoplasm. Which kingdom is this cell LEAST likely to belong to?

Accepted Answer

Plantae

Question 4

Which of the following transport mechanisms is used by eukaryotic cells to import dissolved substances in small vesicles?

Accepted Answer

Pinocytosis

Question 5

A macrophage engulfs a bacterium, forming a phagosome. The phagosome then fuses with a lysosome, forming a phagolysosome. What is the primary function of the hydrolytic enzymes in this process?

Accepted Answer

To destroy the engulfed bacterium

Question 6

Which of the following best describes the difference between septate and aseptate hyphae in fungi?

Accepted Answer

Septate hyphae have divisions between cells, while aseptate hyphae lack these divisions.

Question 7

Which of the following fungal spores is produced asexually and is NOT enclosed in a sac?

Accepted Answer

Conidiospore

Question 8

A patient with AIDS develops pneumonia caused by Pneumocystis jirovecii. This is an example of which type of infection?

Accepted Answer

Opportunistic mycosis

Question 9

Which of the following protozoans is the only ciliated protozoan known to cause human disease?

Accepted Answer

Balantidium coli

Question 10

Which phase of the Apicomplexan life cycle involves the production of merozoites by repeated asexual cell division?

Accepted Answer

Merogony

Question 11

Which of the following is a correct comparison between eukaryotic and prokaryotic flagella?

Accepted Answer

Eukaryotic flagella are made of tubulin and move in a wave-like motion.

Question 12

Which of the following structures is responsible for protein synthesis in eukaryotic cells and can be found both free in the cytoplasm and bound to the endoplasmic reticulum?

Accepted Answer

Ribosome

Question 13

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

Accepted Answer

Maintaining cell shape and facilitating movement

Question 14

Which organelle is responsible for modifying, sorting, and distributing proteins and lipids in eukaryotic cells?

Accepted Answer

Golgi apparatus

Question 15

A scientist is studying a eukaryotic cell that contains contractile vacuoles. What is the most likely function of these vacuoles?

Accepted Answer

Regulating osmotic pressure

Question 16

Which of the following is a distinguishing feature of mitochondria that supports their bacterial origin?

Accepted Answer

Contain 70S ribosomes and a circular genome

Question 17

Which of the following best describes the function of the eukaryotic glycocalyx?

Accepted Answer

It serves as a sticky extracellular layer involved in protection, adhesion, and cell communication.

Question 18

Which of the following is TRUE regarding the cell wall in eukaryotes?

Accepted Answer

Only plants, fungi, and certain protists have a cell wall, and it lacks peptidoglycan.

Question 19

Which of the following is a real-world example of a disease caused by a spore-forming protozoan that requires an arthropod vector?

Accepted Answer

Malaria caused by Plasmodium species

Introduction to Eukaryotic Cells: Structure, Function, and Classification

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