Question 1

Which of the following best explains why mitochondria and chloroplasts have their own DNA and ribosomes?

Accepted Answer

According to the endosymbiotic theory, they originated from prokaryotic cells that were engulfed and became organelles.

Question 2

A scientist discovers a unicellular organism with a nucleus, membrane-bound organelles, and a cell wall made of chitin. To which kingdom does this organism most likely belong?

Accepted Answer

Fungi

Question 3

Which of the following statements correctly distinguishes eukaryotic cells from prokaryotic cells?

Accepted Answer

Eukaryotic cells possess a nucleus and membrane-bound organelles, while prokaryotic cells do not.

Question 4

Which of the following best describes the function of hyphae in fungi?

Accepted Answer

They are thread-like structures that absorb nutrients and form a mycelium.

Question 5

A patient is diagnosed with a mycosis. Which of the following is the most accurate definition of mycosis?

Accepted Answer

A disease caused by fungi

Question 6

Which of the following is NOT a correct pairing of a eukaryotic kingdom and its cell wall composition?

Accepted Answer

Animalia – peptidoglycan

Question 7

Which of the following best explains why the kingdom Protista is often described as a 'catchall' kingdom?

Accepted Answer

It includes organisms that do not fit into the plant, animal, or fungi kingdoms.

Question 8

Which of the following correctly matches a fungal spore type with its description?

Accepted Answer

Conidiospores – asexual spores formed at the tips or sides of hyphae

Question 9

A researcher is studying a eukaryotic cell with a plasma membrane containing ergosterol. To which kingdom does this cell most likely belong?

Accepted Answer

Fungi

Question 10

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

Accepted Answer

Protecting the cell and aiding in cell communication

Question 11

A sample contains a multicellular organism that obtains food by ingestion and lacks a cell wall. To which kingdom does it most likely belong?

Accepted Answer

Animalia

Question 12

Which of the following best describes the structure of eukaryotic flagella?

Accepted Answer

Composed of microtubules arranged in a 9+2 pattern and moves in a whip-like motion

Question 13

Which of the following organelles is correctly matched with its function?

Accepted Answer

Mitochondria – produces ATP through cellular respiration

Question 14

A protozoan is classified based on its mode of movement. Which of the following is NOT a main grouping of protozoans?

Accepted Answer

Myceliates

Question 15

Which of the following statements about eukaryotic ribosomes is correct?

Accepted Answer

They are 80S ribosomes found free in the cytoplasm or attached to the rough ER.

Question 16

A patient presents with symptoms of Valley fever. Which type of organism is responsible for this disease?

Accepted Answer

Fungus

Question 17

Which of the following best describes the function of the rough endoplasmic reticulum (Rough ER)?

Accepted Answer

Synthesizes and transports proteins

Question 18

Which of the following equations best represents the process of ATP production in mitochondria during cellular respiration?

Accepted Answer

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

Question 19

A biologist observes a worm that is cylindrical, unsegmented, and lives in soil. To which group of parasitic helminths does it most likely belong?

Accepted Answer

Roundworms

Question 20

Which of the following scenarios best illustrates the application of the endosymbiotic theory in modern medicine?

Accepted Answer

Recognizing that some antibiotics can harm mitochondria because their ribosomes resemble those of bacteria

Introduction to Eukaryotic Cells: Structure, Classification, and Function

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