Question 1

Which of the following best supports the endosymbiotic theory for the origin of mitochondria in eukaryotic cells?

Accepted Answer

Mitochondria contain their own circular DNA and prokaryotic-like ribosomes.

Question 2

A scientist observes a eukaryotic cell with a thick, rigid cell wall composed mainly of chitin. Which organism is the scientist most likely studying?

Accepted Answer

A fungus

Question 3

Which structure in eukaryotic cells is primarily responsible for adherence, protection, and signal reception?

Accepted Answer

Glycocalyx

Question 4

A patient is diagnosed with a systemic fungal infection. Which of the following characteristics is most likely to be used to classify the fungus responsible?

Accepted Answer

Type of sexual spore produced

Question 5

Which of the following statements about eukaryotic flagella is correct?

Accepted Answer

They have a 9+2 arrangement of microtubules and are covered by an extension of the cell membrane.

Question 6

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

Accepted Answer

Golgi apparatus

Question 7

A unicellular eukaryote is observed to have chloroplasts, a cell wall, and is capable of photosynthesis. To which group does it most likely belong?

Accepted Answer

Algae

Question 8

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

Accepted Answer

Anchoring organelles and enabling amoeboid movement

Question 9

A patient presents with gastrointestinal symptoms after traveling to a tropical region. Microscopic examination reveals a unicellular organism with pseudopods and no cell wall. Which group does this organism most likely belong to?

Accepted Answer

Protozoa

Question 10

Which of the following is true of both algae and protozoa?

Accepted Answer

They both contain mitochondria.

Question 11

Which of the following best describes the main difference between vegetative hyphae and reproductive hyphae in filamentous fungi?

Accepted Answer

Vegetative hyphae digest and absorb nutrients, while reproductive hyphae produce spores.

Question 12

Which of the following is a correct sequence for the synthesis and transport of a secreted protein in a eukaryotic cell?

Accepted Answer

Nucleus $$\rightarrow$$ Rough ER $$\rightarrow$$ Golgi apparatus $$\rightarrow$$ vesicle $$\rightarrow$$ secretion

Question 13

Which of the following statements about parasitic helminths is correct?

Accepted Answer

They reproduce by producing eggs and sperm.

Question 14

A laboratory technician is trying to identify a protozoan pathogen in a stool sample. Which of the following features would be most useful for identification?

Accepted Answer

Shape, type of locomotor structures, and number of nuclei

Question 15

Which of the following is a real-world example of a disease caused by a pathogenic flagellate protozoan?

Accepted Answer

African sleeping sickness caused by Trypanosoma brucei

Question 16

Which of the following best explains why red tides caused by dinoflagellates can be dangerous to humans?

Accepted Answer

Dinoflagellates produce toxins that can accumulate in seafood and cause neurological symptoms.

Question 17

Which of the following is a distinguishing feature of the cell wall in algae compared to fungi?

Accepted Answer

Algal cell walls may contain cellulose, pectin, and calcium carbonate, while fungal cell walls contain chitin or cellulose.

Question 18

A patient is infected with a helminth that has a flattened, nonsegmented body and sucking mouthparts. Which group does this helminth most likely belong to?

Accepted Answer

Trematodes (flukes)

Question 19

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

Accepted Answer

Intracellular digestion of food particles and protection against invading microbes

Question 20

Which of the following is a correct statement about the distribution and impact of parasitic helminths?

Accepted Answer

They infect billions of humans worldwide and are more prevalent in tropical regions.

Chapter 5

Study Guide - Practice Questions

Study Guide - Flashcards