Q: Which equation represents the conversion of cellulose to glucose by fungal cellulases?

$$\text{(C}_6\text{H}_{10}\text{O}_5\text{)}_n + n\text{H}_2\text{O} \rightarrow n\text{C}_6\text{H}_{12}\text{O}_6$$

Question 1

Which of the following best explains why fungi are essential to the carbon cycle in terrestrial ecosystems?

Accepted Answer

Fungi digest lignin and cellulose, releasing carbon atoms back to the environment.

Question 2

A farmer notices that his corn crop is infected with a fungus that produces motile spores. Which fungal lineage is most likely responsible for this infection?

Accepted Answer

Chytrids

Question 3

Which adaptation allows multicellular fungi to efficiently absorb nutrients from their environment?

Accepted Answer

The large surface area of mycelium

Question 4

Which enzyme is primarily responsible for breaking down lignin in plant cell walls?

Accepted Answer

Lignin peroxidase

Question 5

A biologist finds a fungus with sac-like structures containing eight spores. Which lineage does this fungus most likely belong to?

Accepted Answer

Ascomycota

Question 6

Which of the following best describes the mutualistic relationship between mycorrhizal fungi and plants?

Accepted Answer

Fungi provide plants with water and minerals, while plants supply fungi with carbohydrates.

Question 7

Which equation represents the conversion of cellulose to glucose by fungal cellulases?

Accepted Answer

$$	ext{(C}_6	ext{H}_{10}	ext{O}_5	ext{)}_n + n	ext{H}_2	ext{O} ightarrow n	ext{C}_6	ext{H}_{12}	ext{O}_6$$

Question 8

Which fungal structure is responsible for asexual reproduction in bread molds such as Rhizopus nigricans?

Accepted Answer

Asexual sporangia

Question 9

Lichens are important bioindicators because:

Accepted Answer

They are sensitive to air pollution and their presence indicates clean air.

Question 10

Which of the following best describes the life cycle of Basidiomycota?

Accepted Answer

Haploid spores are produced in club-shaped basidia after meiosis.

Question 11

Which of the following is a real-world application of fungi in agriculture?

Accepted Answer

Mycorrhizal fungi are used to enhance plant growth by increasing nutrient uptake.

Question 12

Which scenario best illustrates the role of saprophytic fungi in ecosystems?

Accepted Answer

Fungi break down dead organic matter, recycling nutrients.

Question 13

Which of the following is NOT a characteristic of multicellular fungal bodies?

Accepted Answer

They are always composed of single-celled yeasts.

Question 14

Which process occurs during extracellular digestion in fungi?

Accepted Answer

Fungi secrete enzymes to break down complex molecules outside their bodies.

Question 15

Which fungal lineage is most closely associated with the formation of lichens?

Accepted Answer

Ascomycota

Question 16

Which of the following best describes the role of lignin peroxidase in fungal decomposition?

Accepted Answer

It catalyzes an oxidation step that creates free radicals, breaking down lignin polymers.

Question 17

Which equation represents the alternation of generations in fungi, involving both haploid and diploid stages?

Accepted Answer

$$n \rightarrow 2n \rightarrow n$$

Question 18

Which of the following is a plausible consequence of fungal infection in amphibian populations?

Accepted Answer

Decline in amphibian populations due to parasitic chytrids.

Question 19

Which fungal lineage is most likely to be used as a biological control agent against mosquitoes?

Accepted Answer

Chytrids

Question 20

Which of the following best explains why fungi are more closely related to animals than to land plants?

Accepted Answer

Fungi and animals share a common ancestor and similar molecular traits.

Chapter 29: Fungi – Structure, Function, and Diversity

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