MCQ Bank

In mycorrhizal associations, fungi improve the plant's ability to absorb water and minerals from the soil. In return, plants provide carbohydrates to the fungi.

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Q31

Chytrids store their carbohydrates in the form of:

A) Lipids
B) Starch
C) Glycogen
D) Glucose

AI Explanation

Chytrids, like many fungi, store carbohydrates mainly in the form of glycogen. This storage compound serves as an energy reserve.

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Q32

Which of the following is an antibiotic derived from fungi?

A) Penicillin
B) Morphine
C) Insulin
D) Estrogen

AI Explanation

Penicillin is an antibiotic originally derived from the fungus Penicillium. It is widely used to treat bacterial infections by inhibiting bacterial cell wall formation.

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Q33

What is the main structural component of the chytrid fungal cell wall?

A) Peptidoglycan
B) Glycogen
C) Chitin
D) Cellulose

AI Explanation

The cell walls of chytrid fungi contain chitin, a structural polysaccharide common in fungal cell walls. Chitin provides strength and protection to fungal cells.

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Q34

Mushrooms belong to which phylum of fungi?

A) Ascomycota
B) Deuteromycota
C) Zygomycota
D) Basidiomycota

AI Explanation

Mushrooms are members of the phylum Basidiomycota. They produce sexual spores called basidiospores on specialized structures known as basidia.

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Q35

What type of hyphae are involved in mushroom mycelium?

A) Monokaryotic
B) Dikaryotic
C) Septate
D) Aseptate

AI Explanation

Mushroom mycelium commonly consists of dikaryotic hyphae, which contain two genetically distinct nuclei per cell. This stage is important in the life cycle of many Basidiomycota fungi.

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Q36

In mutualism, both organisms:

A) One benefits, one is harmed
B) Benefit from the interaction
C) Are harmed
D) Compete for nutrients

AI Explanation

Mutualism is a relationship in which both organisms gain benefits from their interaction. Neither organism is harmed in this type of association.

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Q37

The primary reproductive strategy of mushrooms is:

A) Budding
B) Fission
C) Sexual reproduction
D) Fragmentation

AI Explanation

Mushrooms primarily reproduce sexually by producing basidiospores. These spores are formed on specialized structures called basidia.

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Q38

Which of the following is a typical example of a zygomycete fungus?

A) Penicillium chrysogenum
B) Agaricus bisporus
C) Saccharomyces cerevisiae
D) Rhizopus stolonifer

AI Explanation

Rhizopus stolonifer, commonly known as black bread mold, is a typical example of a zygomycete fungus. It reproduces sexually by forming zygospores.

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Q39

Glomeromycota form a symbiotic relationship with the roots of approximately:

A) 25% of land plants
B) 100% of land plants
C) 80% of land plants
D) 50% of land plants

AI Explanation

Glomeromycota form arbuscular mycorrhizal associations with approximately 80% of terrestrial plant species. These fungi help plants absorb nutrients and water from soil.

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Q40

Rhizopus belongs to which class of fungi?

A) Glomeromycota
B) Ascomycota
C) Zygomycota
D) Basidiomycota

AI Explanation

Rhizopus is a well-known example of a fungus traditionally classified under the phylum Zygomycota. It is commonly found as a bread mold and forms zygospores during sexual reproduction.

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Q41

Approximately what percentage of true fungi species are classified under Zygomycota?

A) 20%
B) 5%
C) 1%
D) 10%

AI Explanation

Zygomycota represents a relatively small proportion of true fungal species, estimated at around 5%. Most known fungi belong to other major groups such as Ascomycota and Basidiomycota.

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Q42

What type of relationship do fungi have with most plants?

A) Symbiotic (mutualistic)
B) Parasitic
C) Commensal
D) Antagonistic

AI Explanation

Many fungi form mutualistic relationships with plants, especially through mycorrhizal associations. The fungus helps plants obtain nutrients and water while receiving carbohydrates in return.

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Q43

Which type of reproduction is found in Glomeromycota?

A) Both sexual and asexual
B) Only sexual
C) Budding
D) Only asexual

AI Explanation

Glomeromycota are generally considered to reproduce asexually through the formation of spores. They do not have a known sexual reproductive stage.

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Q44

Seeds first appeared during which geological period?

A) Triassic
B) Devonian
C) Carboniferous
D) Jurassic

AI Explanation

The earliest seed plants appeared during the Devonian period. This development was a major evolutionary step that allowed plants to reproduce more effectively on land.

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Q45

Why do mosses remain small in size compared to vascular plants?

A) They lack vascular tissues
B) Their roots are shallow
C) They lack sunlight
D) They have slow growth rate

AI Explanation

Mosses are non-vascular plants and do not have specialized tissues for transporting water and nutrients over long distances. This limits their size compared with vascular plants.

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Q46

Which male plant structure produces pollen?

A) Stigma
B) Style
C) Anther
D) Ovary

AI Explanation

The anther is the male reproductive structure of a flower that produces pollen grains. Pollen contains the male gametes required for fertilization.

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Q47

What is the function of rhizoids in moss?

A) Anchorage and absorption
B) Reproduction
C) Seed dispersal
D) Photosynthesis

AI Explanation

Rhizoids in mosses help attach the plant to the substrate and absorb some water and nutrients. They are not true roots because they lack vascular tissues.

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Q48

The largest living group of gymnosperms is:

A) Ferns
B) Gnetophytes
C) Cycads
D) Conifers

AI Explanation

Conifers are the largest and most diverse living group of gymnosperms. They include plants such as pines, firs, and spruces.

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Q49

What makes seed plants less dependent on water for reproduction?

A) Water storage in leaves
B) Pollen grains do not need water to reach the ovule
C) Rhizoids
D) Stomata

AI Explanation

Seed plants are less dependent on water for reproduction because pollen can be transported by wind or animals to the ovule. This allows fertilization to occur without free water.