Question 1

Which statement best describes the endosymbiotic theory as it relates to the evolution of eukaryotes?

Accepted Answer

Eukaryotes originated when a prokaryotic cell engulfed another prokaryote, which then became an organelle such as the mitochondrion.

Question 2

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

Accepted Answer

Eukaryotic cells use DNA as their genetic material, while prokaryotic cells use RNA.

Question 3

Which of the following kingdoms includes organisms that are primarily decomposers and reproduce by forming spores?

Accepted Answer

Kingdom Fungi

Question 4

A patient is diagnosed with a parasitic helminth infection. Which of the following best describes helminths?

Accepted Answer

Multicellular eukaryotes that are classified as worms and may cause disease in humans.

Question 5

Which process is responsible for the sexual reproduction in fungi, resulting in genetic variation?

Accepted Answer

Meiosis

Question 6

Which of the following is an example of a human mycosis?

Accepted Answer

Ringworm

Question 7

Why is Protista sometimes described as a catchall kingdom?

Accepted Answer

It includes organisms that do not fit into the other eukaryotic kingdoms due to their diverse characteristics.

Question 8

Which of the following is NOT one of the four main groupings of protozoans?

Accepted Answer

Mycetes

Question 9

Which structural feature of eukaryotic plasma membranes distinguishes them from prokaryotic plasma membranes?

Accepted Answer

Incorporation of sterols such as cholesterol

Question 10

A scientist compares the cell walls of fungi and plants. Which statement is correct?

Accepted Answer

Fungal cell walls are composed of chitin, while plant cell walls are made of cellulose.

Question 11

Which equation correctly represents the breakdown of glucose via glycolysis in eukaryotic cells?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 2\mathrm{NAD^+} + 2\mathrm{ADP} + 2\mathrm{P_i} \rightarrow 2\mathrm{C_3H_4O_3} + 2\mathrm{NADH} + 2\mathrm{ATP} + 2\mathrm{H_2O}$$

Question 12

Which of the following statements about eukaryotic flagella is TRUE?

Accepted Answer

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

Question 13

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

Accepted Answer

Golgi apparatus

Question 14

A cell is observed to have abundant rough endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Protein synthesis for export

Question 15

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

Accepted Answer

Nucleolus: ribosome production

Question 16

Which of the following statements about eukaryotic ribosomes is correct?

Accepted Answer

Eukaryotic ribosomes are 80S and are found both free in the cytoplasm and attached to the rough endoplasmic reticulum.

Question 17

A researcher is studying the differences between eukaryotic and prokaryotic flagella. Which of the following is a key difference?

Accepted Answer

Eukaryotic flagella are powered by ATP-driven microtubule sliding, while prokaryotic flagella rotate using a proton motive force.

Question 18

Which of the following best explains how hyphae contribute to fungal growth?

Accepted Answer

Hyphae are thread-like structures that allow fungi to absorb nutrients and expand their colony.

Question 19

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

Accepted Answer

Ribosomal RNA synthesis and ribosome assembly

Question 20

A medical laboratory identifies a protozoan that moves using pseudopodia. To which group does this organism most likely belong?

Accepted Answer

Amoeboids

Eukaryotic Microorganisms: Structure, Classification, and Cellular Features

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