Virus, Viroid and Iichens

1.Match the following columns. Column - IColumn - II A.DJ Ivanowsky (1892) 1. Viroids B.MW Beijerinck (1898) 2. First crystallised TMV C.WM Stanley (1935) 3. Contagium vivum fluidum D.TO Diener (1971) 4. Mosaic disease of tobacco A B C D A B C D 1) 1 4 3 2 2) 2 1 4 3 3) 4 3 2 1 4) 3 2 1 4 2.Plant viruses with double stranded DNA is 1) Cauliflower mosaic viruses 2) TMV 3) HIV viruses 4) Chilli mosic viruses 3.Viruses did not find a place in classification since 1) They are not truely living 2) They are cellular 3) They are obligate parasite 4) They are pathogenic 4.The protein coat of a virus / is known as 1) Nucleoid 2) Capsid 3) Capsomere 4) Outer envelope 5.The subunit of capsid is called 1) Capsomere 2) Core 3) Nucleoside 4) Nucleotide 6.The non - living characteristic of viruses is 1)Ability to multiply only inside the host 2)Ability to cause diseases in the host 3)Ability to undergo mutation 4)Ability of crystallisation 7.Bacteriophages are 1) Bacteria that attack viruses 2) Viruses that attack bacteria 3) Free - living viruses 4) Free - living bacteria 8.Viroids have 1)ds DNA enclosed by protein coat 2)ss DNA enclosed by protein coat 3)ss RNA not enclosed by protein coat 4)ds RNA enclosed by protein coat 9.Which of the following are most suitable indicators of SO2 pollution in the environment ? 1) Lichens 2) Conifers 3) Algae 4) Fungi 10.Which of the following would appear as the pioneer organisms on bare rocks ? 1) Liverworts2) Mosses 3) Green algae 4) Lichens 11.Study the following statements and identify the correct option given below. I.Viruses that infect plants have single - stranded RNA and viruses that infect animals have either single or double - stranded RNA or double - stranded DNA. II.Bacterial viruses or bacteriophages are usually single - stranded RNA viruses. 1) I is true, but II is false 2) I is false, but II is true 3) I and II are true4) I and II are false 12.Assertion: Viruses cause diseases and replicate when they are in the host cell. Reason: Viruses are obligate parasite 1)Both Assertion and Reason are true and Reason is the correct explanation ofAssertion 2)Both Assertion and Reason are true, but Reason is not the correct explanation ofAssertion 3)Assertion is true, but Reason is false 4)Assertion is false, but Reason is true 13.Which of the following are not included under five kingdom clasification of whittaker 1) Virus 2) Viroid 3) Lichens 4) All of these 14.Which of the following statement are not correct A)Viroids have low molecular weight B)lichens grow very fastly C)lichens are example for symbiosis D)lichens have algal partener is called mycobiont and fungal partener is phycobiont 1)A and B 2) B and C 3) C and D 4) B and D 15.Potato spindle tuber disease caused by 1) Viroid 2) Prion 3) Virus 4) Bacteria 16.Which of the following are heterotrophic plants 1) Cuscuta 2) Nepanthes 3) Utricularia 4) All of these 17.Alternate generations means sporophyte and gametophyte seen in following kingdom 1) Plantae2) Mycoplasma 3) Bacteria 4) All of these 18.Prions means 1) Virus particle 2) Protienaceous infections agents 3) 1 & 2 4) RNA act as infectious agent 19.Sexual systems of classification by 1) Bentham - Hooker 2) Linnaeus 3) Engler - Prantle 4) Hutchinson 20.Match Column I with Column II and select the correct option from the given codes. Column I Column II A.Plant virus i) Kuru disease B.Animal virus ii) Potato spindle tuber C.Viroids iii) Polio D.Prions iv) Tobacco mosaic 1) A - iv, B - iii, C - ii, D – I 2) A - i, B - ii, C - iii, D - iv 3) A - iii, B - iv, C - i, D – ii 4) A - ii, B - iii, C - iv, D - i 21.Virion is 1) Nucleic acid of virus 2) Antiviral agent 3)Protein of virus 4)Completely assembled virus out side the host 22.Difference between virus and viroid is 1)Absence of protein coat in viroid but present in virus 2)Presence of low molecular weight RNA in virus but absent in viroid 3)Both 1 and 2 4) None of the above 23.Mycorrhiza represents 1)Parasitic association betweena fungus and an alga 2)Symbiotic association between a fungus and roots of higher plants 3)Parasitic associtation between fungus and roots of plants 4)Symbiotic association between a fungus and all liver worts 24.Statement - I : Lichens are good pollution indicators Statement - II : Lichens do not grow in polluted areas 1)Both the statement - I & Statement - II are correct 2)Statement - I is correct, Statement - II is incorrect 3)Both the Statement - I & Statement - II are incorrect 4)Statement - I is incorrect, Statement - II is correct 25.The algal component of lichen is called 1) Mycobiont2) Phycobiont 3) Capsomere 4) peplomere 26.Examine the figure (A & B) given below and select the right option which both are identified correctl AB 1)Bacteriophage (ssRNA)Tobacco mosaic virus (dsDNA) 2)Tobacco mosaic virus (ssRNA) HIV (ssRNA) 3)Bacteriophage (dsDNA)Tobacco mosaic virus (dsDNA) 4)Tobacco mosaic virus (ssRNA) Bacteriophage (dsDNA) 27.Symptom not seen in plants due to viruses is 1)Mosaic formation 2) Leaf rolling and curling 3) Yellowing, vein clearing 4) Root knot 28.Which of the following statement is not correct the virus? 1)Viruses are obligate parasites 2)Viruses can multiply only when they are inside the living cell 3)viruses cannot passes through bacterial filter 4)Viruses are made up of protein and DNA (or) RNA (Never both DNA & RNA) 29.Which of the following is not a characteristic feature of viruses? 1)They are non-cellular organisms 2)A virus contain both DNA and RNA 3)They can pass through bacterial filter 4)are characterized by having an inert crystalline structure outside the living cell 30.Viroid differ from virus in beings 1)Naked RNA molecule only 2)Naked DNA molecule only 3)Naked DNA packed with viral genome 4)Satellite RNA packed with viral genome 31.Assertion : Lichens are symbiotic relationship between algae and fungi. Reason : Algae provide shelter and absorb mineral nutrients and water for its partner. 1) Both A and R true and R is the correct explanation of A 2) Both A and R true but R is not correct explanation of A 3) A is true but R is false 4) A is false and R is true 32. The imperfect fungi which are decomposers of litter and help in mineral cycling belong to : 1) Basidiomycetes 2) Phycomycetes 3) Ascomycetes 4) Deuteromycetes 33. Pick the incorrect statement 1) Neurospora is used in the study of biochemical genetics 2) Penicillium is multicellular and produces antibiotics 3) Yeast is unicellular and used in fermentation 4) Morels and truffles are poisonous mushrooms 34. 35. Assertion : Deuteromycetes are known as imperfect fungi. Reason : Only the sexual or vegetative phases of these fungi are known. 1) Both A and R true and R is the correctexplanation of A 2) Both A and R true but R is not correctexplanation A 3) A is true but R is false 4) A is false and R is true 36. Identify the organism on the basis of following characters : (A) Infectious ssRNA of low molecular weight (B) Lacks protein coat (C) Causes potato spindle tuber disease 1) Prions 2) Virus 3) Viroids 4) Bacteria 37. Infectious and free RNA particle having low molecular weight were discovered by :1) Diener 3) Stanley 2) Beijerinek 4) Pasture 38. Which one of the following matches is correct ? 1)AlternariaSexualreproduction absent-Deuteromycetes 2) Mucor—Reproduction by Conjugation---Ascomycetes 3) Agaricus --Parasitic fungus----- Basidiomycetes 4) Phytophthora---Aseptate mycelium----Basidiomycetes 39. Match the following. Column-I A) Penicillium B) Albugo C) Ustilago D) Trichoderma Column-II i) Imperfect fungus ii) Conidia iii) Parasite iv) Smut 1) A-iv; B-iii; C-ii; D-i 3) A-ii; B-iii; C-iv; D-i 2) A-i; B-ii; C-iii; D-iv 4) A-iii; B-ii; C-iv; D-i 40.Which one of the following statement is in correct about the plant virus seen here ? 1) It is rod shaped 2) It was discovered by Ivanowsky 3) It was first crystallized by Stanley 4) Its Genetic material is D.N.A 41. How many of the following fungi belongs to class ascomycetes? Rhizopus, Penicillium, Yeast, Mucor, Agaricus, Puccinia, Albugo, Claviceps, Neurospora, Alternaria, Trichoderma, Aspergillus, Ustilago, Morels, Truffles, Colletotrichum, Toadstool 1) Five 2) Seven 3) Nine 4) Ten 42. Exogenously produced sexual spores of fungi are 1) Zoospores 2) Conidia 3) Ascospores 4) Basidiospores 43. Exogenously produced sexual spores of fungi are 1) Zoospores 2) Conidia 3) Ascospores 4)Basidiospores 44. Read the following statement (A-C) regarding the class phycomycetes & select correct statement (A) In phycomycetes mycelium is multinucleate (Coenocytic) and aseptate (B) Asexual reproduction take place through Zoospore or Aplanospore (C)Albugo is parasitic fungi (D) conidia are produced exogenously on conidiophores. 1) only A,D2) onlyB,D 3) only C,D 4) Only A, B, C 45. Which of the following statement(s) is / are correct about ascomycetes ? 1) Neurospora, which is used in biochemical and genetic work is a member of this class. 2) They are mostly multicellular; e.g., Yeast, or rarely uncellular, e.g., Penicillium. 3) They are saprophytic, decomposers, Parasitic or coprophilous 4) All the above KEY SHEET 1. 32. 13. 1 4. 2 5. 1 6. 4 7. 2 8. 3 9. 1 10. 4 11. 112. 1 13. 4 14. 4 15. 1 16. 4 17. 1 18. 2 19. 2 20. 1 21. 4 22. 1 23. 2 24. 1 25. 2 26. 4 27. 4 28. 3 29. 2 30. 1