InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The imperfect fungi which are decomposes of litter and help in mineral cycling belong toA. DeuteromycetesB. BasidiomycetesC. PhycomycetesD. Ascomyoetes |
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Answer» Correct Answer - A (a) The imperfecti fungi which are decomposers of litter and help in mineral cycling belong to Deuteromycetes. They are fungi which do not fit into the commonly established taxonomic classification of fungi. They include all those fungi in which the perfect stage (sexual stage) is not reported. |
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| 2. |
Choose the wrong statementsA. Penicillium is multicellular and produces antibioticsB. Neurospora is used in the study of biochemical geneticsC. Morels and truffles are poisonous mushroomsD. Yeast is unicellular and useful in fermentation |
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Answer» Correct Answer - C (c) All statements are correct, except statement (c), which can be corrected as Morels and truffles are edible and members of Ascomyceteds in fungi. |
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| 3. |
What is unique in the cell wall of fungi ?A. N-Muramic acidB. N-Acetyl glucosamineC. celluloseD. Diaminopimelic acid |
| Answer» Correct Answer - B | |
| 4. |
One of the major components of cell wall of most fungi isA. peptidoglycanB. celluloseC. hemicelluloseD. chitin |
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Answer» Correct Answer - D (d) Cell wall of most fungi is made up of chitin. Chemically it is N-acetyl glucosamine. It is also found in the exoskeleton of insects. |
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| 5. |
Which of the following would appear as the pioneer organisms on bare rocks?A. LiverwortsB. MossesC. Green algaeD. Lichens |
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Answer» Correct Answer - D (d) In primary succession on rocks, lichens secrete acids to disssolve rock, helps in weathering and soil formation. So, lichens are pioneer species to colonise the bare rock. |
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| 6. |
Uninucleated and pigmented conidia are a characteristics features ofA. RhizopusB. PenicilliumC. AgaricusD. Yeast |
| Answer» Correct Answer - B | |
| 7. |
Zygospores formed by the conjugation of coenogametangia areA. thin walled and blue greenB. thick walled and blackC. thick walled and greenD. thin walled and bluish. |
| Answer» Correct Answer - B | |
| 8. |
Fungi and algae show similarity inA. presence of sexual reproductionB. paramylon as food reserveC. constitution of cell wallD. having similar chlorophylls |
| Answer» Correct Answer - A | |
| 9. |
Yeasts grow abundantly onA. cow Dung and Cow urineB. orgainc matter rich in sugarC. organic matter rich in fatsD. nectar |
| Answer» Correct Answer - B | |
| 10. |
Yeasts differ from bacteria in beingA. unicllularB. eukaryoticC. prokaryoticD. akaryotic |
| Answer» Correct Answer - B | |
| 11. |
The yeasts differ from Penicillium in beingA. unicellularB. multicellularC. parasiticD. saprophytic |
| Answer» Correct Answer - A | |
| 12. |
Pseudomycelium in yeasts is produced at the time ofA. buddingB. fissionC. sexual reprodutionD. never formed |
| Answer» Correct Answer - A | |
| 13. |
Lichen are ecologically important as theyA. are source of some nedicinesB. are pioneers of succession on barren rocks (Lithosere)C. are symbionts of algae and fungiD. are associated with mycorrhizal roots |
| Answer» Correct Answer - B | |
| 14. |
Lichens multiply byA. conidiaB. oidiaC. ascosporesD. soredia |
| Answer» Correct Answer - D | |
| 15. |
Sexual reproductive structures in lichens are produced byA. AlgaeB. FungiC. Both algae and fungiD. Lichens remain vegetative and do not reproduce |
| Answer» Correct Answer - B | |
| 16. |
In Rhizoups species, the sexual reproduction takes place between two gametangia containing coenogmaete by the process ofA. oogamyB. somatogamyC. gemetangial copulationD. gametangial contact |
| Answer» Correct Answer - C | |
| 17. |
The species of Penicillium used in ripening/maturation of cheese other than P camturmberti isA. P. notatumB. P. chrysogenumC. P. roquefortiD. P. vermiculatum |
| Answer» Correct Answer - C | |
| 18. |
Ergot of rye is caused by a species ofA. UstilagoB. ClavicepsC. ErysipheD. Phytophthora |
| Answer» Correct Answer - B | |
| 19. |
Consider the following stages 1. Spermogonial 2. Aecial 3. Uredial 4. Telial 5. Basidial The correct sequene of these stages in the life-cycle of Puccinia graminis tritici isA. 2,1,4,3,5B. 1,2,4,5,3C. 1,2,3,4,5D. 2,1,4,5,3 |
| Answer» Correct Answer - C | |
| 20. |
Which one is the wrong pairing for the disease and its causal organisum?A. Loose smut of wheat - Ustilago nudaB. Root - knot of vegetables - Meloidogy- ne sp.C. Late blight of potato - Alternaria solaniD. Black rust of wheat - Puccinia graminis |
| Answer» Correct Answer - C | |
| 21. |
The mode of nutrition in all fungi is alwaysA. auotrophicB. saprophyticC. parasiticD. heterotrophic |
| Answer» Correct Answer - D | |
| 22. |
The staple crop in lreland was completely destryed in 1844-1846, by a fungal disease resulting in a great famine. The causal organism in this case wasA. Puccinia graminisB. Ustilago triticiC. Phytophthora infestansD. Claviceps purpurea |
| Answer» Correct Answer - C | |
| 23. |
Which of the organism is used as food ?A. Bracket fungiB. AgaricusC. ClavicepsD. Moulds |
| Answer» Correct Answer - B | |
| 24. |
Which one single organism or the pair of organisms is correctly group?A. Lichen is a composite organsim formed from the symbiotic association of analgae and a protozoanB. Yeast used in making bread and beer is a fungusC. Nostoc and Anabaena are examples of ProtistaD. Paramecium and plasmodium belong to the same kingdom as that of Penicillum |
| Answer» Correct Answer - B | |
| 25. |
Saprophyte is an organism that depends on dead plant or animal tissue for a source of nutrition and metabolic energy. Which ot the following is the most appropriate definition of a fungus?A. Eukaryotic multicellular heterotrophB. Parasitic, eukaryotic plantC. Saprophytic plantsD. Saprophytic heterotroph |
| Answer» Correct Answer - D | |
| 26. |
Which of the following environment conditions are essential for optimum growth of Mucor on a piece of bread A. Temperature of about `25^(@) C` B. Temperature of about `5^(@) C` C. Relative humidity of about 5% D. Relative humidity of about 95% E. A shady place F. A brightly illuminated place Choose the answer from the follwoing optionsA. B, D and E onlyB. B, C and F onlyC. A, C and E onlyD. A, D and E only |
| Answer» Correct Answer - D | |
| 27. |
Thread like structures constituting the body mycelium of the fungus are known asA. thallusB. paraphysesC. hyphaeD. rhizines |
| Answer» Correct Answer - C | |
| 28. |
The life cycle of moulds/ Rhizopus/ Mucor isA. isomorphicB. haplonticC. diplonticD. heteromorphic |
| Answer» Correct Answer - B | |
| 29. |
Technically homothallic mycelium is described asA. self compatibleB. self sterileC. unisexualD. all of these |
| Answer» Correct Answer - A | |
| 30. |
Mycelium of Mucor/Rhizopus isA. septate and unicellularB. septate and multicellularC. aseptate and uninucleateD. coenocytic |
| Answer» Correct Answer - D | |
| 31. |
Oidia resemble yeast inA. fermentationB. sexual reproductionC. being diploidD. all of these |
| Answer» Correct Answer - A | |
| 32. |
Fungi and bacteria areA. producersB. consumersC. reducers/decomposersD. none of these |
| Answer» Correct Answer - C | |
| 33. |
Which one of the following is popularly called eukaryotic E. coli ?A. NeurosporaB. RhizopusC. SaccharomycesD. Eubacteria |
| Answer» Correct Answer - C | |
| 34. |
Which one of the following is wrong for fungiA. They are eukaryoticB. All fungi possess a purely cellulosic cell wall.C. They are heterotrophic.D. They are both unicellular and multicellular |
| Answer» Correct Answer - B | |
| 35. |
Poisonous mushrooms are popularly calledA. Puff BallsB. Toad StoolsC. Bracket fugiD. Sponge Mushrooms |
| Answer» Correct Answer - B | |
| 36. |
Lichens indicate `S_O_(2)` pollution because theyA. show association between algae and fungiB. grow faster than otherC. are sensitive to `S_O_(2)`D. flourish in `S_O_(2)` rich environment |
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Answer» Correct Answer - C (c) Lichens, the composite organisms consist of a specific fungus living in symbiotic association with one or sometimes, two species of algae. Lichens ar world-wide in distribution. These arepioneer colonisers of barren rocks and mountains. Being extremely sensitive tto `S_O_(2)` , the lichens especially epiphytic lichens serve as bioindicators air pollution. |
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| 37. |
Absorytive heterotrophic nutrition is exhibited byA. algaeB. fungiC. bryophytesD. pteridophytes |
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Answer» Correct Answer - B (b) Fungi are hererotrophic, e.g. these require an organic source of carbon, also require some source of nitrogen, inorganic ions (?) trace elements (Fe, Zn, Cu) and growth factors like vitamins. Fungi may act as saprobes and parasites. They obtain nutrition form host by means of special structures called haustoria and exhibit absorptive or holophytic type of nutrition. |
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| 38. |
Mycology (Mycetology) is a branch which deals with the study ofA. AlgaeB. FungiC. VirusesD. Bacteria |
| Answer» Correct Answer - B | |
| 39. |
Most of the lichens consist ofA. blue-green algae and BasidomycetesB. blue-green algae and AscomycetesC. red algae and AscomycetesD. brown algae and Phycomycetes |
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Answer» Correct Answer - B (b) Lichens consist of the fungal component mycobiont, mainly Ascomycotina (only a few Basidiomycotina and Deuteromycotina) and the algal component, phycobiont which are mostly blue-green algae (Nostoc, Scytonema) or green algae (Trebouxia, Trentophila, etc.) |
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| 40. |
Which one of the following is not true about lichens?A. Their body is composed of both algal and fungal cellsB. Some form food for reindeers in Arctic regionsC. Some species can be used as pollution indicatorsD. These grow very fast at the rate of about 2 cm per year |
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Answer» Correct Answer - D (d) Statement (d) is incorrect because lichens show very slow growth. Their size and slow rate of growth suggest that some lichens in the Arctic are 4000 years ago. |
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| 41. |
The chemical compounds produced by the host plants to protect themselves against fungal infection isA. PhytotoxinB. pathogenC. phytoalexinsD. hormone |
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Answer» Correct Answer - C (c) Phytoalexins are chemical substances produced by plants in response to fungal infection and are toxic to fungi. |
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| 42. |
White rust disease is caused byA. ClavicepsB. AlternariaC. PhytophthoraD. Albugo candida |
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Answer» Correct Answer - D (d) Albugo candida (Oomycetes ) is an obligate patasite commonly found parastising a wide range of crucifers. It causes a disease called white rust or blister rust of crucifers resulting in economically significant losses in the yield of turnip, rape and mustard. |
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| 43. |
Which fungal disease spreads by seed and flowers?A. Loose smut of wheatB. Corn stuntC. Covered smut of barleyD. Soft rot of potato |
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Answer» Correct Answer - A (a) Fungal disease, loose smut of whet spreads by seed and flowers. The causal organism of this disease is Ustilago fungus. It is an internal parasite. It has a dikaryotic mycelium which remains within the intercellular spaces of the host tissue. This fungus infects the ovary of the host flower as a result of which the masses of teliospores or brand spores are formed in place of grains, Teliospores are not surrounded by any wall hence, called loose smut. |
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| 44. |
Decomposers are organisms thatA. Elaborate chemical substances, causing death of tissuesB. operate in living body and simplifying organic substances of cells step by stepC. attack and kill plants as well as animalsD. operate in relay terms, simplifying stip by step the organic constituents of dead body |
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Answer» Correct Answer - D (d) Decomposers are the organisms, normally a fungus a bacterium, that digest organic material by secreting digestive enzymes into the environment, in the process liberating nutrients into the environment. These are also known as microconsumers, reducers or scavengers, as converting complex organic constituents of dead bodies of plants, animals, human wastes into simple soluble forms. |
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| 45. |
Plant decomposers areA. Monera and FungiB. Fungi and plantsC. Protista and AnimaliaD. Animalia and Monera |
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Answer» Correct Answer - A (a) Decomposers are living components chiefly the bacteria and fungi that breakdown the complex compounds of dead protoplasm of producers and consumers absorb some products and release others. |
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| 46. |
Black rust of wheat is caused byA. PucciniaB. MucorC. AspergillusD. Rhizopus |
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Answer» Correct Answer - A (a) Black rust of wheat is caused by Puccinia graminis tritici. This is the potential cause of enomous economic loss in all wheat growing regions of the world. Puccinia graminis tritici usually passes its life cycle on two different hosts, wheat and barbery. |
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| 47. |
Adhesive pad of fungi penetrates the host with the help ofA. mechanical pressure and enzymesB. hooks and suckersC. softening by enzymesD. only by mechanical pressure |
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Answer» Correct Answer - D (a) Cell wall degrading enzymes (cellulolytic, pectolytic) as well as mechanical pressure of adhesive pad (appressorium) help the fungus in penetrating the host. |
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| 48. |
Coenocytic, aseptate hyphae are a characteristic feature ofA. PenicilliumB. AgaricusC. YeastD. Rhizopus |
| Answer» Correct Answer - D | |
| 49. |
A fungus with hyphae containing two nuclei from different genomes, the nuclei do not fuse but divide independently and simultaneously as new cells are formed, isA. phycomycetesB. zygomycetesC. deutermycetesD. basidiomycetes |
| Answer» Correct Answer - D | |
| 50. |
Bread becomes porous due to release of `CO_(2)` by the action ofA. yeastB. bacteriaC. virusD. protozoans |
| Answer» Correct Answer - A | |