Question 1

Which of the following is NOT a general characteristic of protozoa?

Accepted Answer

They are eukaryotic.

Question 2

Which statement best describes the difference between haploid and diploid nuclei in eukaryotic microbes?

Accepted Answer

Haploid nuclei contain a single copy of the genome, while diploid nuclei contain two copies.

Question 3

A patient presents with fever, lymph node swelling, and headaches after returning from Africa. A lesion is found at the site of a tsetse fly bite. Which protozoan is most likely responsible?

Accepted Answer

Trypanosoma brucei

Question 4

Which of the following statements about fungal cell walls is correct?

Accepted Answer

Fungal cell walls are typically composed of chitin.

Question 5

Which process is a major feature of apicomplexan life cycles and involves the formation of multinucleate cells before division?

Accepted Answer

Schizogony

Question 6

Which division of fungi is characterized by the formation of ascospores in sacs called asci?

Accepted Answer

Ascomycota

Question 7

A red tide in marine waters is most likely caused by an abundance of which type of eukaryotic microbe?

Accepted Answer

Dinoflagellates

Question 8

Which of the following is TRUE regarding the reproduction of algae?

Accepted Answer

Unicellular algae reproduce asexually by mitosis followed by cytokinesis.

Question 9

Which of the following eukaryotic microbes is responsible for Chagas’ disease, a leading cause of heart failure in Latin America?

Accepted Answer

Trypanosoma cruzi

Question 10

Which of the following is a distinguishing feature of water molds compared to true fungi?

Accepted Answer

Water molds have tubular cristae in their mitochondria.

Question 11

Which equation correctly represents the alternation of generations in algae, where $n$ is the haploid number and $2n$ is the diploid number?

Accepted Answer

$n \rightarrow 2n \rightarrow n$

Question 12

Which of the following is NOT a function or significance of fungi?

Accepted Answer

Perform photosynthesis to produce oxygen.

Question 13

Which protozoan is diagnosed by the presence of trophozoites in vaginal or urethral secretions and is treated with nitroimidazole drugs?

Accepted Answer

Trichomonas vaginalis

Question 14

Which of the following is TRUE about the nutrition of most protozoa?

Accepted Answer

Most are chemoheterotrophic.

Question 15

Which of the following is a correct statement about the classification of eukaryotic microorganisms?

Accepted Answer

Modern classification is based on similarities in nucleotide sequences.

Question 16

Which of the following is a correct description of the life cycle of protozoa that enter the body via ingestion?

Accepted Answer

They alternate between trophozoite (feeding/reproducing) and cyst (infective) forms.

Question 17

Which of the following is TRUE regarding the reproduction of fungi?

Accepted Answer

All fungi have some means of asexual reproduction involving mitosis and cytokinesis.

Question 18

Which of the following is a pathogenic ciliate that can infect humans?

Accepted Answer

Balantidium

Question 19

Which of the following statements about the medical relevance of Ascomycota is correct?

Accepted Answer

Some Ascomycota cause mycoses that can spread throughout the body.

Question 20

A pregnant woman is advised to avoid cat feces to prevent infection by which apicomplexan protozoan?

Accepted Answer

Toxoplasma gondii

Eukaryotic Microbes: Structure, Classification, and Medical Relevance

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