Free Kingdom Fungi MCQs with Answers

201. The given sexual reproductive structure of fungi belongs to phylum

• A. Ascomycota
• B. Zygomycota
• C. Basidiomycota
• D. Deuteromycota

Explanation: The correct answer is ascomycota. Fungi in the Ascomycota phylum are known for their distinctive sexual reproductive structure, the ascus, where spores called ascospores are formed. This differentiates them from Zygomycota, which form zygospores, Basidiomycota, which form basidiospores on basidia, and Deuteromycota, which do not have a known sexual reproductive stage.

202. The option that CORRECTLY matches the fungal hypha and zygote with its respective ploidy is

• A. A
• B. B
• C. C
• D. D

Explanation: The correct match is: Fungal Hypha=N (Haploid) or N + N (Dikaryotic/Heterokaryotic) Zygote=2N (Diploid) So the correct match is option C Dikaryotic hypha is haploid.

203. A student prepared a temporary slide microscope culture and examined it under the microscope.The microscopic view depicts that the unknown material is

• A. Yeast
• B. Rhizopus
• C. Mushroom
• D. Penicillium

Explanation: The correct answer is Rhizopus. Rhizopus is known for its filamentous structure, which appears as a tangled mass of hyphae under the microscope, a key feature that distinguishes it from other fungi like yeast, penicillium, or mushrooms. Yeast is unicellular and appears as small, oval cells. Penicillium forms a brush-like appearance, and mushrooms are not typically viewed on a slide culture as they are larger fruiting bodies.

204. Deuteromycetes differ from other types of fungi based on the

• A. Absence of chitin
• B. Presence of conidia
• C. Absence of sexual reproduction
• D. Presence of absorptive nutrition

Explanation: Deuteromycetes differ from other fungi because they lack a known sexual reproductive stage. Other characteristics, such as chitin in the cell wall, conidia production, and absorptive nutrition, are shared by many or all fungal groups. Therefore, the key distinguishing trait is the absence of sexual reproduction.

205. The option that identifies the stored form of food in fungi and plants is

• A. Fungi: starch, Plant: glycogen
• B. Fungi: glycogen, Plant: starch
• C. Fungi: glycogen, Plant: glycogen
• D. Fungi: starch, Plant: starch

Explanation: The correct answer is that fungi store food as glycogen and plants store food as starch. Fungi are more similar to animals in this respect, storing energy in the form of glycogen. In contrast, plants store energy primarily as starch. Starch is a polysaccharide that serves as a storage form of energy in plants. Thus, options A, C, and D are incorrect because they do not accurately describe the storage forms in fungi and plants.

206. The fungus that possesses non-septate and multinucleate hyphae

• A. Yeast
• B. Rhizopus
• C. Mushroom
• D. Penicillium

Explanation: The correct answer is Option B: Rhizopus. Rhizopus species are part of the Zygomycetes class of fungi, which are characterized by having non-septate (coenocytic) and multinucleate hyphae. This means their hyphae lack cross-walls and contain multiple nuclei within a single continuous cytoplasm.Option A: Yeasts are unicellular and do not form hyphae like the ones described in the question.Option C: Mushrooms have septate hyphae, meaning their hyphae are divided by cross-walls, which does not match the 'non-septate' description.Option D: Penicillium species also have septate hyphae, making this option incorrect for the characteristics given.

207. The given diagram shows the secondary mycelium of a basidiomycete.

• A. Meiosis occurs in the gills of basidiocarp
• B. Germination of basidiospores takes place in the basidiocarp
• C. Plasmogamy occurs between positive and negative mating types
• D. Karyogamy in the basidia leads to the formation of diploid nuclei

Explanation: Plasmogamy is the fusion of the cytoplasm between two compatible primary, haploid mycelia (often designated as positive and negative mating types). This process brings the two haploid nuclei into the same cell, initiating the dikaryotic (N+N) secondary mycelium shown in the diagram.

208. The oyster mushroom penetrates the nematodes, absorbs their nutrients and result in death of nematodes.This type of feeding relationship in fungi is an example of

• A. Mutualism
• B. Predation
• C. Commensalism
• D. Decomposition

Explanation: The correct answer is predation. In this scenario, the oyster mushroom actively hunts and consumes the nematodes, absorbing their nutrients and causing their death. This is a classic example of predation, where one organism (the predator) benefits at the expense of another (the prey), which is killed in the process.Mutualism is incorrect because it involves mutual benefit, which is not present here. Commensalism is incorrect as it involves one organism benefiting without affecting the other, unlike the lethal interaction described. Decomposition refers to breaking down already dead matter, not living organisms.

209. Green algae and fungal species of ascomycetes form a mutualistic association with each other. This type of association is identified asI. lichenII. ectomycorrhizalIII. Endomycorrhiza

• A. I only
• B. II only
• C. III only
• D. II and III

Explanation: The correct answer is 'I only.' Lichens are a mutualistic association between green algae and fungal species of ascomycetes. In this symbiosis, the algae provide photosynthetic products to the fungus, while the fungus provides protection and access to nutrients. The options II and III refer to different types of mycorrhizal associations, which involve fungi and plant roots, not algae.

210. In contrast to Kingdoms Animalia and Plantae, the organisms of Kingdom Fungi have

• A. A cell wall
• B. Nuclear mitosis
• C. Centrioles in cells
• D. Heterotrophic mode of nutrition

Explanation: The correct answer is B: nuclear mitosis. Fungi are unique in that they perform nuclear mitosis, where their nuclear envelope remains intact during division, unlike plants and animals. Option A is incorrect because both fungi and plants have cell walls, although of different materials. Option C is incorrect because centrioles are characteristic of animal cells, not fungi. Option D is incorrect because although fungi are heterotrophic, this trait is shared with animals and does not exclusively define fungi.