Question 1

Which of the following statements best describes protists?

Accepted Answer

Protists are eukaryotes that do not belong to the kingdoms of animals, plants, or fungi.

Question 2

Which nutritional strategy is NOT found among protists?

Accepted Answer

Chemoautotrophy using inorganic chemicals as energy source

Question 3

What is the main ecological role of protists in aquatic ecosystems?

Accepted Answer

They function as producers, consumers, and decomposers, forming a crucial part of the microbial loop.

Question 4

Which of the following is a key difference between oomycetes and true fungi?

Accepted Answer

Oomycetes have cell walls made of cellulose, while true fungi have cell walls made of chitin.

Question 5

Which of the following best explains the endosymbiotic theory for the origin of eukaryotes?

Accepted Answer

Eukaryotes evolved from prokaryotes by acquiring organelles through engulfment of other cells.

Question 6

Which of the following is a mutualistic symbiosis involving fungi?

Accepted Answer

Mycorrhiza, where fungi provide minerals and water to plant roots in exchange for organic carbon.

Question 7

A scientist discovers a microorganism with the following features: eukaryotic cell structure, cell wall made of cellulose, diploid-dominant life cycle, and flagellated spores. To which group does this organism most likely belong?

Accepted Answer

Oomycetes

Question 8

Which of the following is a major advantage of sexual reproduction in fungi?

Accepted Answer

It increases genetic diversity, enhancing adaptive potential.

Question 9

Which structure is responsible for the filamentous growth of fungi and the formation of mycelium?

Accepted Answer

Hyphae

Question 10

Which of the following best describes the role of fungi in the carbon cycle?

Accepted Answer

Fungi decompose organic matter, releasing carbon dioxide ($$CO_2) $$back into the atmosphere.

Question 11

Which of the following is a correct statement about the differences between Bacteria, Archaea, and Eukarya?

Accepted Answer

Bacteria and Eukarya have ester-linked membrane lipids, while Archaea have ether-linked membrane lipids.

Question 12

A patient develops a fungal infection after receiving a catheter and antibiotics. Which property of fungi explains their ability to act as opportunistic pathogens in such cases?

Accepted Answer

Fungi can exploit weakened immune systems and disrupted microbiota to colonize new niches.

Question 13

Which of the following is a real-world example of a mutualistic interaction involving protists?

Accepted Answer

Ciliates in the gut of cockroaches help break down wood, in association with methanogenic archaea.

Question 14

Which fungal group is most closely related to animals, based on evolutionary history?

Accepted Answer

Chytridiomycota

Question 15

Which of the following best explains why fungi are so successful in terrestrial environments?

Accepted Answer

Fungi can bridge air-filled gaps, penetrate solids, and translocate solutes through their hyphal networks.

Question 16

Which of the following is a correct description of the lichen symbiosis?

Accepted Answer

A fungus and an alga or cyanobacterium form a close association, exchanging nutrients and enabling survival in harsh environments.

Question 17

Which of the following equations best represents the process of fungal decomposition of cellulose?

Accepted Answer

$$(C_6H_{10}O_5$)_n + n H_2O \rightarrow n C_6H_{12}O_6$

Question 18

Which fungal group forms arbuscular mycorrhizae with plant roots, facilitating nutrient exchange?

Accepted Answer

Glomeromycota

Question 19

A leaf-cutter ant colony cultivates fungi in their nests. What is the ecological significance of this relationship?

Accepted Answer

The ants provide plant material for the fungi, which break it down and serve as a food source for the ants.

Microbial Diversity: Protists and Fungi (General Biology Study Notes)

Study Guide - Practice Questions

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