Question 1

Which of the following is NOT considered evidence supporting the endosymbiotic theory for the origin of eukaryotic cells?

Accepted Answer

Eukaryotic cells have a single plasma membrane surrounding all organelles.

Question 2

Which cellular structure is present in both prokaryotes and eukaryotes, but differs in size and composition?

Accepted Answer

Ribosome

Question 3

A scientist discovers a unicellular organism with a cell wall, no nucleus, and circular DNA. Which kingdom does this organism most likely belong to?

Accepted Answer

Monera

Question 4

Which of the following is a distinguishing feature of eukaryotic cells compared to prokaryotic cells?

Accepted Answer

Presence of membrane-bound organelles

Question 5

Which of the following diseases is caused by a protozoan pathogen?

Accepted Answer

Malaria

Question 6

In eukaryotic cells, which organelle is primarily responsible for ATP production?

Accepted Answer

Mitochondrion

Question 7

Which structure is found in eukaryotic cells but NOT in prokaryotic cells?

Accepted Answer

Nucleus

Question 8

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

Accepted Answer

Modification and sorting of proteins

Question 9

Which evolutionary development enabled the emergence of the eukaryotic cell?

Accepted Answer

Acquisition of mitochondria via endosymbiosis

Question 10

Which of the following structures is involved in eukaryotic cell motility?

Accepted Answer

Flagella

Question 11

A cell is observed to have a plasma membrane, cytoplasm, and ribosomes, but lacks a nucleus and mitochondria. Which type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 12

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

Accepted Answer

Intracellular digestion

Question 13

Which of the following best explains why animal and plant cells differ in their extracellular structures?

Accepted Answer

Plant cells have a rigid cell wall made of cellulose, while animal cells lack a cell wall.

Question 14

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

Accepted Answer

Protein synthesis

Question 15

Which of the following correctly matches the organelle with its function?

Accepted Answer

Nucleus: DNA storage and transcription

Question 16

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

Accepted Answer

Nucleus

Question 17

Which of the following is a key difference between unicellular and multicellular organisms?

Accepted Answer

Unicellular organisms can perform all life functions within a single cell.

Question 18

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

Accepted Answer

Eukaryotic flagella are composed of microtubules arranged in a 9+2 pattern.

Question 19

Which of the following best describes the genetic material in prokaryotic cells?

Accepted Answer

Circular DNA located in the nucleoid region

Question 20

Which of the following is a function of the vacuole in plant cells?

Accepted Answer

Storage of water and nutrients

Eukaryotic Cell Biology: Evolution, Structure, and Function

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