1Which of the following is the primary component of the cell wall in true fungi?
A.Cellulose
B.Peptidoglycan
C.Chitin
D.Starch
Correct Answer: Chitin
Explanation:The cell walls of true fungi are primarily composed of chitin, a polymer of N-acetylglucosamine. Cellulose is found in plants and Oomycetes (fungal-like organisms), while peptidoglycan is found in bacteria.
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2Fungi that obtain their nutrients from dead organic matter are termed as:
A.Parasites
B.Saprophytes
C.Symbionts
D.Autotrophs
Correct Answer: Saprophytes
Explanation:Saprophytes are organisms that feed on dead and decaying organic matter. Parasites feed on living hosts, and symbionts live in association with others.
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3A fungal thallus where the entire vegetative body is converted into a reproductive unit is called:
A.Eucarpic
B.Holocarpic
C.Coenocytic
D.Septate
Correct Answer: Holocarpic
Explanation:In holocarpic fungi, the entire thallus is converted into one or more reproductive structures. In eucarpic fungi, reproductive organs arise from only a portion of the thallus.
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4A hypha containing many nuclei within a common cytoplasm without cross-walls (septa) is described as:
A.Monokaryotic
B.Dikaryotic
C.Coenocytic
D.Septate
Correct Answer: Coenocytic
Explanation:Coenocytic (or aseptate) hyphae lack septa, resulting in a continuous mass of cytoplasm containing multiple nuclei. This is characteristic of Zygomycota and Oomycota.
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5Which type of fungal tissue consists of loosely woven hyphae where the individual hyphae retain their identity?
A.Pseudoparenchyma
B.Prosenchyma
C.Sclerenchyma
D.Collenchyma
Correct Answer: Prosenchyma
Explanation:Prosenchyma is a type of plectenchyma (fungal tissue) where hyphae are loosely interwoven and parallel, and the individual cells are distinguishable.
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6Which specialized somatic structure is used by parasitic fungi to absorb nutrients from the host cell without killing it immediately?
A.Rhizoid
B.Sclerotium
C.Haustorium
D.Appressorium
Correct Answer: Haustorium
Explanation:A haustorium is a specialized projection of the hyphae that penetrates the host cell wall (but not the membrane) to absorb nutrients.
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7The resting body of a fungus, consisting of a hard, compact mass of hyphae capable of surviving unfavorable conditions, is known as a:
A.Stroma
B.Sclerotium
C.Rhizomorph
D.Sporangium
Correct Answer: Sclerotium
Explanation:A sclerotium is a hard, compact mass of mycelium that serves as a survival structure during adverse environmental conditions.
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8In the binomial system of nomenclature, the first word represents the __ and the second word represents the __.
A.Species, Genus
B.Genus, Species epithet
C.Order, Family
D.Family, Genus
Correct Answer: Genus, Species epithet
Explanation:According to the binomial system developed by Linnaeus, the first name is the Genus (generic name) and the second is the Species epithet.
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9According to the International Code of Nomenclature for algae, fungi, and plants (ICN), the suffix -mycota indicates which taxonomic rank?
A.Class
B.Order
C.Phylum
D.Family
Correct Answer: Phylum
Explanation:The suffix -mycota is used to designate a Phylum (or Division) in fungal taxonomy (e.g., Ascomycota).
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10Which of the following is considered a 'fungal-like' organism belonging to the Kingdom Stramenopila (Chromista)?
A.Aspergillus
B.Agaricus
C.Pythium
D.Puccinia
Correct Answer: Pythium
Explanation:Pythium belongs to the Oomycota, which are fungal-like organisms in the Kingdom Stramenopila/Chromista, unlike the others which are true fungi.
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11The sexual spores produced by fungi in the Phylum Zygomycota are called:
A.Ascospores
B.Basidiospores
C.Zygospores
D.Oospores
Correct Answer: Zygospores
Explanation:Zygospores are the thick-walled resting sexual spores formed by the fusion of gametangia in Zygomycetes.
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12Which substance is the primary storage polysaccharide in fungi?
A.Starch
B.Glycogen
C.Cellulose
D.Pectin
Correct Answer: Glycogen
Explanation:Fungi store food reserves primarily as glycogen and oils, similar to animals, rather than starch which is found in plants.
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13The fusion of two protoplasts (cytoplasm) without the fusion of nuclei is termed:
A.Karyogamy
B.Plasmogamy
C.Meiosis
D.Mitosis
Correct Answer: Plasmogamy
Explanation:Plasmogamy is the first stage of sexual reproduction in fungi where the cytoplasm of two parent cells fuses, bringing two nuclei close together.
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14Dolipore septa are a characteristic feature of which fungal group?
A.Ascomycota
B.Zygomycota
C.Basidiomycota
D.Chytridiomycota
Correct Answer: Basidiomycota
Explanation:Dolipore septa are specialized septa with a barrel-shaped swelling around the central pore, characteristically found in Basidiomycetes (except rusts and smuts).
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15Which of the following spores is endogenous (produced inside a sac-like structure)?
A.Conidia
B.Sporangiospore
C.Basidiospore
D.Uredospore
Correct Answer: Sporangiospore
Explanation:Sporangiospores are asexual spores produced internally within a sac called a sporangium. Conidia and Basidiospores are exogenous.
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16The root-like aggregation of somatic hyphae which functions in transport and absorption is called:
A.Sclerotium
B.Stroma
C.Rhizomorph
D.Appressorium
Correct Answer: Rhizomorph
Explanation:Rhizomorphs are thick, root-like cords of aggregated hyphae that help in the transport of water and nutrients and the spread of the fungus.
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17Fungi Imperfecti (Deuteromycota) are so named because they lack:
A.Asexual reproduction
B.Sexual reproduction
C.Mycelium
D.Spores
Correct Answer: Sexual reproduction
Explanation:Fungi Imperfecti (Deuteromycetes) are fungi for which the sexual (perfect) stage has not been observed or does not exist.
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18The standard suffix for a fungal Order is:
A.-mycetes
B.-ales
C.-aceae
D.-mycotina
Correct Answer: -ales
Explanation:In fungal nomenclature, the suffix -ales denotes an Order (e.g., Uredinales).
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19Which of the following is a characteristic of Oomycetes that distinguishes them from true fungi?
A.Chitinous cell wall
B.Haploid vegetative state
C.Biflagellate zoospores with one tinsel and one whiplash flagellum
D.Presence of ergosterol
Correct Answer: Biflagellate zoospores with one tinsel and one whiplash flagellum
Explanation:Oomycetes produce zoospores with two different flagella (heterokont): one tinsel type and one whiplash type. They also have cellulose walls and a diploid vegetative state, unlike true fungi.
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20The 'Clamp connection' is a hook-like structure formed to ensure proper segregation of nuclei during cell division in:
A.Ascomycota
B.Basidiomycota
C.Zygomycota
D.Oomycota
Correct Answer: Basidiomycota
Explanation:Clamp connections are unique to the secondary mycelium of Basidiomycetes and function to ensure that each daughter cell receives a compatible pair of nuclei.
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21Asexual spores formed at the tip or side of a hypha (conidiophore) are called:
A.Oospores
B.Zygospores
C.Conidia
D.Ascospores
Correct Answer: Conidia
Explanation:Conidia are non-motile, asexual spores that are formed exogenously (externally) on specialized hyphae called conidiophores.
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22The causal organism of Late Blight of Potato, Phytophthora infestans, belongs to which Class?
A.Oomycetes
B.Zygomycetes
C.Ascomycetes
D.Basidiomycetes
Correct Answer: Oomycetes
Explanation:Phytophthora infestans is an Oomycete (water mold), not a true fungus.
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23Which structure is an enlarged, globose, thick-walled asexual resting spore formed from hyphal cells?
A.Chlamydospore
B.Zoospore
C.Basidiospore
D.Ascospore
Correct Answer: Chlamydospore
Explanation:A Chlamydospore is a thick-walled asexual resting spore formed by the modification of a hyphal segment.
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24In the Ascomycota, the sexual spores (ascospores) are typically produced in a number of _____ per ascus.
A.2
B.4
C.8
D.Thousands
Correct Answer: 8
Explanation:Typically, an ascus contains 8 ascospores, resulting from one meiotic division (producing 4 nuclei) followed by one mitotic division.
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25The fungal tissue that looks like parenchyma of higher plants but consists of oval cells formed by the segmentation of hyphae is called:
A.Prosenchyma
B.Pseudoparenchyma
C.Collenchyma
D.Sclerenchyma
Correct Answer: Pseudoparenchyma
Explanation:Pseudoparenchyma is a fungal tissue where hyphae are tightly packed, and the cells appear oval or isodiametric, resembling plant parenchyma.
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26Rust fungi (Uredinales) are often heteroecious, meaning they:
A.Require two different hosts to complete their life cycle
B.Have distinct male and female thalli
C.Produce only one type of spore
D.Can only survive on dead matter
Correct Answer: Require two different hosts to complete their life cycle
Explanation:Heteroecious rusts require two taxonomically different host plants to complete their life cycle (e.g., Wheat and Barberry for stem rust).
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27The swollen tip of a germ tube or hypha that facilitates attachment and penetration into a host plant is called an:
A.Appressorium
B.Haustorium
C.Sclerotium
D.Sporangium
Correct Answer: Appressorium
Explanation:An Appressorium is a flattened, thickened tip of a hyphal branch used for attachment and mechanical penetration of the host surface.
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28Which scientist is credited with the binomial system of nomenclature?
A.Anton de Bary
B.Carl Linnaeus
C.E.J. Butler
D.Louis Pasteur
Correct Answer: Carl Linnaeus
Explanation:Carl Linnaeus established the binomial system of nomenclature in his work Species Plantarum (1753).
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29The 'Perfect stage' of a fungus refers to its:
A.Asexual stage
B.Sexual stage
C.Vegetative stage
D.Parasitic stage
Correct Answer: Sexual stage
Explanation:The Perfect stage (teleomorph) refers to the phase of the life cycle where sexual reproduction (meiosis and fertilization) occurs.
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30Which of the following classes is known for producing motile zoospores with a single posterior whiplash flagellum?
A.Chytridiomycetes
B.Oomycetes
C.Zygomycetes
D.Ascomycetes
Correct Answer: Chytridiomycetes
Explanation:Chytridiomycetes produce zoospores with a single posterior whiplash flagellum. Oomycetes have two flagella.
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31The fusion of two nuclei is known as:
A.Plasmogamy
B.Karyogamy
C.Cytogamy
D.Dikaryotization
Correct Answer: Karyogamy
Explanation:Karyogamy is the fusion of two haploid nuclei to form a diploid nucleus (zygote nucleus).
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32Woronin bodies are specialized organelles associated with the septal pores of:
A.Ascomycota
B.Basidiomycota
C.Oomycota
D.Zygomycota
Correct Answer: Ascomycota
Explanation:Woronin bodies are crystalline peroxisomes found near the septal pores in filamentous Ascomycota (and Deuteromycota) that function to plug the pore if the hypha is damaged.
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33The disease 'Club root of crucifers' is caused by Plasmodiophora brassicae, which belongs to:
A.Oomycota
B.Plasmodiophoromycota
C.Ascomycota
D.Basidiomycota
Correct Answer: Plasmodiophoromycota
Explanation:Plasmodiophora brassicae is a slime mold belonging to the Plasmodiophoromycota (often classified within Protista now, but historically studied in mycology).
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34Which type of sexual reproduction involves the transfer of a spermatium (male) to a receptive hypha (female)?
A.Gametangial copulation
B.Gametangial contact
C.Spermatization
D.Somatogamy
Correct Answer: Spermatization
Explanation:Spermatization involves the transfer of minute, non-motile male gametes (spermatia) to a receptive female structure (like a trichogyne).
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35Fungi that have two distinct morphological forms (usually yeast-like at and mold-like at ) are called:
A.Dimorphic fungi
B.Polymorphic fungi
C.Holocarpic fungi
D.Pleomorphic fungi
Correct Answer: Dimorphic fungi
Explanation:Dimorphic fungi exhibit two growth forms: typically a yeast phase (parasitic/high temp) and a mycelial phase (saprophytic/lower temp).
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36In the name Puccinia graminis var. tritici, 'tritici' represents the:
A.Species
B.Genus
C.Variety
D.Family
Correct Answer: Variety
Explanation:In this trinomial, Puccinia is the genus, graminis is the species, and tritici is the variety (or forma specialis), indicating physiological specialization.
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37The cup-shaped fruiting body of an Ascomycete is called a(n):
A.Perithecium
B.Cleistothecium
C.Apothecium
D.Pseudothecium
Correct Answer: Apothecium
Explanation:An Apothecium is an open, cup-shaped or saucer-shaped ascocarp (fruiting body). Perithecia are flask-shaped, and Cleistothecia are closed.
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38The phenomenon where genetic recombination occurs in vegetative hyphae without sexual spore formation (via mitosis and haploidization) is called:
A.Meiosis
B.Parasexuality
C.Parthenogenesis
D.Apomixis
Correct Answer: Parasexuality
Explanation:Parasexuality (or the parasexual cycle) involves plasmogamy, karyogamy, and haploidization occurring within somatic hyphae, not in specific sexual organs.
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39Which order of fungi typically causes 'Powdery Mildews'?
A.Peronosporales
B.Erysiphales
C.Uredinales
D.Ustilaginales
Correct Answer: Erysiphales
Explanation:Erysiphales (Ascomycota) are the obligate parasites responsible for Powdery Mildew diseases. Peronosporales cause Downy Mildews.
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40The smut fungi belong to the Order:
A.Uredinales
B.Ustilaginales
C.Agaricales
D.Sphaeropsidales
Correct Answer: Ustilaginales
Explanation:Smut fungi are classified under the Order Ustilaginales (Basidiomycota).
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41A compact macroscopic somatic structure that serves as a mattress for the formation of fruiting bodies is called:
A.Stroma
B.Sclerotium
C.Rhizomorph
D.Haustorium
Correct Answer: Stroma
Explanation:A Stroma is a compact, mattress-like somatic structure (often made of pseudoparenchyma) on or in which fructifications (spore-bearing structures) are formed.
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42The sterol present in the cell membrane of Oomycetes is unique because:
A.It is Ergosterol
B.They lack sterols or contain plant sterols like fucosterol
C.It is Cholesterol
D.It is Chitin
Correct Answer: They lack sterols or contain plant sterols like fucosterol
Explanation:Unlike true fungi which contain ergosterol, Oomycetes generally lack sterols or absorb/modify plant sterols (like sitosterol or fucosterol) from their host.
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43Sexual reproduction in Zygomycetes involves the fusion of two compatible gametangia to form a:
A.Zygospore
B.Oospore
C.Zoospore
D.Conidium
Correct Answer: Zygospore
Explanation:In Zygomycetes, sexual reproduction occurs via gametangial copulation, resulting in a thick-walled resting spore called a Zygospore.
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44The citation 'L. ex Fr.' in a fungal name implies:
A.Named by Linnaeus, validated by Fries
B.Named by Fries, validated by Linnaeus
C.Named by Linnaeus and Fries together
D.Fries rejected Linnaeus's name
Correct Answer: Named by Linnaeus, validated by Fries
Explanation:'L. ex Fr.' indicates that the name was originally proposed by Linnaeus (pre-starting point) and was later validated/sanctioned by Fries (starting point author).
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45Which of the following is a key characteristic of the Phylum Ascomycota?
A.Production of sexual spores inside an Ascus
B.Motile zoospores
C.Coenocytic mycelium
D.Production of Basidiospores
Correct Answer: Production of sexual spores inside an Ascus
Explanation:The defining characteristic of Ascomycota is the production of sexual spores (ascospores) inside a sac-like structure called an Ascus.
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46The asexual fruiting body that is flask-shaped and lined with conidiophores inside is called a:
A.Acervulus
B.Pycnidium
C.Synnema
D.Sporodochium
Correct Answer: Pycnidium
Explanation:A Pycnidium is a flask-shaped asexual fruiting body containing conidia, characteristic of certain fungi (e.g., Sphaeropsidales).
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47Downy mildew diseases are caused by members of which Family?
A.Peronosporaceae
B.Erysiphaceae
C.Pucciniaceae
D.Mucoraceae
Correct Answer: Peronosporaceae
Explanation:Downy mildews are caused by Oomycetes in the Family Peronosporaceae (Order Peronosporales).
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48In fungal nomenclature, a 'Tautonym' (e.g., Malus malus) is:
A.Allowed
B.Rejected under the ICN
C.Preferred
D.Used for varieties only
Correct Answer: Rejected under the ICN
Explanation:Tautonyms (where the genus and species names are identical) are rejected in the International Code of Nomenclature for algae, fungi, and plants (though allowed in zoology).
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49Somatogamy is a type of sexual process where:
A.Vegetative cells or hyphae fuse
B.Gametes fuse
C.Spermatia fuse with trichogynes
D.Gametangia fuse
Correct Answer: Vegetative cells or hyphae fuse
Explanation:Somatogamy involves the fusion of somatic (vegetative) hyphae rather than specialized sex organs. It is common in Basidiomycetes.
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50The chemical -glucan is a major structural component of the cell wall in:
A.True fungi
B.Oomycetes only
C.Bacteria
D.Viruses
Correct Answer: True fungi
Explanation:While chitin provides rigidity, -glucans are the most abundant structural components in the cell walls of most true fungi.