Question 1

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

Accepted Answer

Mitochondria have their own circular DNA similar to bacterial genomes. $

Question 2

Which of the following best distinguishes eukaryotic cells from prokaryotic cells?

Accepted Answer

Presence of membrane-bound organelles such as the nucleus and mitochondria. $

Question 3

A scientist discovers a unicellular organism with a cell wall, chloroplasts, and the ability to reproduce both sexually and asexually. To which kingdom does this organism most likely belong?

Accepted Answer

Protista $

Question 4

Which of the following is NOT a function of the eukaryotic cytoskeleton?

Accepted Answer

Protein synthesis $

Question 5

Which structure is responsible for packaging and modifying proteins for secretion in eukaryotic cells?

Accepted Answer

Golgi apparatus $

Question 6

A patient is diagnosed with malaria. Which eukaryotic pathogen is responsible for this disease?

Accepted Answer

Plasmodium species $

Question 7

Which of the following evolutionary developments most directly enabled the emergence of complex multicellular eukaryotes?

Accepted Answer

Development of compartmentalized organelles $

Question 8

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

Accepted Answer

Breakdown of macromolecules and cellular debris $

Question 9

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

Accepted Answer

A '9+2' arrangement of microtubules $

Question 10

A cell is observed to have a nucleus, mitochondria, and a cell wall made of cellulose. Which kingdom does it most likely belong to?

Accepted Answer

Plantae $

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

Eukaryotic cells have internal membranes that increase surface area for metabolic processes. $

Question 13

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

Accepted Answer

Mitochondrion – ATP production via oxidative phosphorylation $

Question 14

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

Accepted Answer

It is composed of a phospholipid bilayer with embedded proteins. $

Question 15

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

Accepted Answer

Ribosomal RNA synthesis and ribosome assembly $

Question 16

A mutation disrupts the function of the eukaryotic cytoskeleton. Which of the following cellular processes would be most directly affected?

Accepted Answer

Chromosome segregation during mitosis $

Question 17

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

Accepted Answer

It allows for specialized environments that optimize different metabolic processes. $

Question 18

Which of the following is a correct description of the function of eukaryotic vacuoles?

Accepted Answer

Storage of water, ions, and waste products $

Question 19

Which of the following structures is present in all eukaryotic cells but absent in prokaryotic cells?

Accepted Answer

Nucleus $

Question 20

A researcher is studying a eukaryotic cell that lacks functional mitochondria. Which of the following processes would be most directly impaired?

Accepted Answer

Aerobic respiration $

Eukaryotic Cell Biology and Evolution: Study Notes for Microbiology

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