Question 1

Which of the following statements best explains why mitosis is not synonymous with cell division in eukaryotes?

Accepted Answer

Mitosis is the division of the nucleus, while cell division (cytokinesis) refers to the division of the cytoplasm, which may not always occur simultaneously.

Question 2

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

Accepted Answer

Fungi have cell walls composed of chitin, while algae have cell walls composed of cellulose, agar, or other polysaccharides.

Question 3

A scientist observes a unicellular eukaryote with two equal-sized nuclei, multiple flagella, and no mitochondria. Which group does this organism most likely belong to?

Accepted Answer

Diplomonadida

Question 4

Which of the following best describes the process of schizogony in protozoa?

Accepted Answer

Multiple mitoses occur, producing a multinucleate cell, followed by cytokinesis to produce many daughter cells.

Question 5

Which of the following is a correct sequence of events during sexual reproduction in fungi?

Accepted Answer

Plasmogamy → Karyogamy → Meiosis → Mitosis

Question 6

Which of the following features distinguishes water molds from true fungi?

Accepted Answer

Water molds have tubular cristae in their mitochondria and cell walls of cellulose, while true fungi have flattened cristae and cell walls of chitin.

Question 7

Which of the following is a function of contractile vacuoles in protozoa?

Accepted Answer

They pump excess water out of the cell to maintain osmotic balance.

Question 8

Which group of algae is characterized by the presence of the red pigment phycoerythrin and cell walls composed of agar or carrageenan?

Accepted Answer

Rhodophyta

Question 9

A researcher finds a microorganism with membrane-bound alveoli, two types of nuclei, and cilia for movement. Which subgroup does this organism most likely belong to?

Accepted Answer

Ciliates (Alveolates)

Question 10

Which of the following best explains why large eukaryotes such as mosquitoes and ticks are studied in microbiology?

Accepted Answer

They act as vectors, transmitting microscopic pathogens that cause disease.

Question 11

Which of the following is a unique feature of kinetoplastids among the Euglenozoa?

Accepted Answer

A region of mitochondrial DNA called a kinetoplast

Question 12

Which of the following statements about alternation of generations in multicellular algae is correct?

Accepted Answer

It alternates between haploid and diploid multicellular stages, with gametes produced by mitosis and spores by meiosis.

Question 13

Which of the following is a correct description of the ploidy changes during meiosis?

Accepted Answer

A diploid nucleus divides to produce four haploid nuclei.

Question 14

Which of the following is a reason why there are few pathogenic algae?

Accepted Answer

Algae are primarily aquatic and do not typically infect terrestrial hosts.

Question 15

Which of the following is a distinguishing feature of the division Basidiomycota among fungi?

Accepted Answer

Production of basidiospores on club-shaped structures called basidia

Question 16

Which of the following best describes the ecological role of fungi in the environment?

Accepted Answer

They decompose dead organisms and recycle nutrients.

Question 17

Which of the following is a characteristic of the division Zygomycota?

Accepted Answer

They are mostly saprobes and reproduce asexually via sporangiospores.

Question 18

Which of the following is true regarding the classification of protozoa?

Accepted Answer

It is now primarily based on similarities in nucleotide sequences.

Question 19

Which of the following is a correct statement about the nutrition of most protozoa?

Accepted Answer

Most are chemoheterotrophic and obtain nutrients by phagocytizing bacteria or organic matter.

Characterizing and Classifying Eukaryotes: Microbiology Study Notes

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