Question 1

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

Accepted Answer

Mitochondria have a double membrane and their own circular DNA, similar to bacteria. $$ $$

Question 2

Which of the following is NOT a difference between prokaryotic and eukaryotic cells?

Accepted Answer

Presence of a plasma membrane. $$ $$

Question 3

A scientist discovers a unicellular organism with a nucleus, mitochondria, and chloroplasts. To which kingdom does this organism most likely belong?

Accepted Answer

Protista $$ $$

Question 4

Which of the following best describes the function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Modification, sorting, and packaging of proteins for secretion. $$ $$

Question 5

Which structure is responsible for the movement of eukaryotic cells, such as sperm cells, and what is its main structural protein?

Accepted Answer

Flagellum; tubulin $$ $$

Question 6

Which of the following evolutionary developments most directly enabled the emergence of eukaryotic cells from prokaryotic ancestors?

Accepted Answer

Acquisition of endosymbiotic bacteria that became organelles. $$ $$

Question 7

Which of the following is a key difference between animal and plant cells?

Accepted Answer

Plant cells have chloroplasts, while animal cells do not. $$ $$

Question 8

A patient is diagnosed with malaria, a disease caused by a eukaryotic pathogen. Which of the following best describes the causative agent?

Accepted Answer

A protozoan of the genus Plasmodium. $$ $$

Question 9

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

Accepted Answer

Digestion of macromolecules and cellular debris. $$ $$

Question 10

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

Accepted Answer

Nucleus $$ $$

Question 11

A researcher is studying the cytoskeleton of a eukaryotic cell. Which protein is most directly involved in the formation of microtubules?

Accepted Answer

Tubulin $$ $$

Question 12

Which of the following best explains why eukaryotic cells can be much larger than prokaryotic cells?

Accepted Answer

Eukaryotic cells have internal membrane-bound organelles that compartmentalize functions. $$ $$

Question 13

Which of the following is a function of the eukaryotic cell's plasma membrane?

Accepted Answer

Regulation of the movement of substances into and out of the cell. $$ $$

Question 14

Which of the following is a correct pairing of a eukaryotic organelle and its primary function?

Accepted Answer

Mitochondrion – ATP production via cellular respiration. $$ $$

Question 15

Which of the following best describes the evolutionary advantage of sexual reproduction in eukaryotes?

Accepted Answer

It increases genetic diversity, enhancing adaptability to changing environments. $$ $$

Question 16

Which of the following is a correct description of the function of the nucleolus in eukaryotic cells?

Accepted Answer

It is the site of ribosomal RNA synthesis and ribosome assembly. $$ $$

Question 17

Which of the following is a distinguishing feature of the kingdom Fungi compared to the kingdom Plantae?

Accepted Answer

Fungi have cell walls made of chitin, while plants have cell walls made of cellulose. $$ $$

Question 18

Which of the following best describes the role of vacuoles in plant cells?

Accepted Answer

They store water, nutrients, and waste products, and help maintain turgor pressure. $$ $$

Question 19

Which of the following is a correct statement about the structure and function of eukaryotic cilia?

Accepted Answer

Cilia are composed of microtubules arranged in a 9+2 pattern and are involved in cell movement. $$ $$

Question 20

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

Accepted Answer

Protein synthesis $$ $$

Fundamental Concepts in Eukaryotic Cell Biology and Microbiology

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