Diversity of Plant Life MCQs Part III

1) The nuclear material in bacteria is
a) Nucleic acid only
b) Nucleic acid and histone protein
c) Nucleic acid and cytoplasm
d) All the above

2) The bacterial genome contains:

a) DNA without histone
b) DNA or histone
c) DNA and histone
d) Neither DNA nor histone

3) How many linkage groups are present in bacteria?
a) One
b) Two
c) Three
d) Many

4) Plasmids are
a) Small coils of DNA
b) Small coils of RNA
c) Small particle of RNA plus protein
d) Small photosynthetic particles of bacteria

5) Plasmids are
a) Viruses
b) New type of microorganisms
c) Extrachromosomal genetic elements of bacteria
d) Genetic elements of bacteria

6) Genes which confer antibiotic resistance on bacteria are located on
a) Chromosomal DNA
b) Plasmids
c) RNA
d) Polysome

7) The formation of vinegar from alcohol is caused by
a) Clostridium
b) Bacillus subtilis
c) Azotobacter
d) Acetobacter aceti

8) Bacterial photosynthesis is unique as
a) It can take place without photosynthetic pigments
b) It can take place without water
d) it can take place without light

9) In photosynthetic bacteria, the purple pigment occurs in the
a) Chloroplast
b) Chromatophores
c) Stroma
d) Grana

10) Which of the following is not a characteristic of bacteria?
b) Presence of plastids
c) Fermentation
d) Parasitic nature

11) All life on earth derives energy directly or indirectly from the sun except
a) mushroom and mould
b) Chemosynthetic bacteria
c) Symbiotic bacteria
d) Pathogenic bacteria

12) The donor
in bacterial photosynthesis is


13) Photoautotrophic bacteria
a) do not release oxygen
b) occasionally release oxygen
c) rarely release oxygen
d) always release oxygen

14) Denitrifying bacteria convert
a) Nitrate to free nitrogen
b) Nitrogen to ammonia
c) Ammonia to nitrite
d) Nitrite to nitrate

15) The nitrifying bacteria are
a) autotrophic
b) saprophytic
c) parasitic
d) chemosynthetic

16) The nitrifying bacteria that convert the ammonia to nitrates are
a) Azotobacter
b) Rhizobium leguminosarum
c) Thiobacillus denitrificans
d) Nitrosomonas and Nitrobacter

17) The bacteria which reduce the fertility of the soil is
a) Azotobacter
b) Nitrobacter
c) Nitrosomonas
d) Bacillus denitrificans

18) The process of nitrogen fixation by Rhizobium leguminosarum in root
nodules of legumes is known as

a) Abiotic nitrogen fixation
b) Non-symbiotic nitrogen fixation
c) Symbiotic nitrogen fixation
d) Autotrophic nitrogen fixation

19) The biological process carried on by Rhizobium is called
a) Nitrification
b) Ammonification
c) Nitrogen fixation
d) Fermentation

20) Nodules with nitrogen-fixing bacteria are present in
a) Mustard
b) Wheat
c) Gram
d) Cotton

21) Nitrifying bacteria are those which can convert
a) Atmospheric nitrogen into ammonia
b) Ammonia into nitrates
c) Nitrites into nitrates
d) Nitrates into ammonia

22) Which one of the following is a chemoautotrophic bacterium?
a) Nitrosomonas
b) Rhizobium
c) E. coli
d) Lactobacillus

23) Which one of the following is a chemoautotrophic bacterium?
a) Nitrosomonas
b) Rhizobium
c) E. coli
d) Lactobacillus

24) Bacteria responsible for nitrification come under the following groups
a) Coccus
b) Comma
c) Bacillus
d) Spiral

25) A free-living bacterium capable of fixing atmospheric nitrogen is
a) Azotobacter
b) Streptococcus
c) Staphylococcus
d) None of these

26) Putrefying bacteria act upon
a) Proteins
b) Starch
c) Fats
d) Carbohydrates

27) Plants obtain their nitrogen supply through the bacteria of the soil because
a) Nitrogen is found only in soil
b) They cannot absorb atmospheric nitrogen directly
c) Bacteria are abundant in the soil
d) Only soil bacteria have nitrogen

28) Bacillus ramosus and B. vulgaris are examples of
a) Ammonifying bacteria
b) Nitrate bacteria
c) Nitrite bacteria
d) Symbiotic bacteria

29) Which of the following represents an obligate anaerobe?
a) Spirogyra
b) Pisum sativum
c) Acetobacter
d) Methane bacteria

30) We can keep food for a longer duration in cold storage than in an ordinary cupboard

a) Low temperature causes plasmolysis
b) Insects can not cause infection
c) Bacterial multiplication is greatly increased
d) Bacterial multiplication is greatly inhibited

31) Which of the following is a bacterial disease?
a) Measles
b) Small pox
c) Rabies
d) Tuberculosis

32) The protists used for the construction of soundproof rooms are
a) Dinoflagellate
b) Diatoms
c) Euglenoids
d) Zooflagellates

33) Which one of the following is not a diatom?
a) Actinophrys
b) Navicula
c) Cyclotella
d) Pinnularia

34) Which class of protozoa is a total parasite?
a) Ciliate
b) Mastigophora
c) Sporozoa
d) Sarcodina

35) Which one of the following is called the “slipper animalcule”?
a) Vorticella
b) Opalina
c) Paramoecium
d) Gelonidinum

36) The branch of botany which deals with fungi is known as
a) Phycology
b) Mycology
c) Microbiology
d) Embryology

37) In which form is reserve food material stored by fungi?
a) Glycogen and oil bodies
b) Mucopeptides
c) Starch
d) Alcohol

38) The cell wall of fungi is made up of
a) Lipid
b) Cellulose
c) Protein
d) Chitin and hemicellulose

39) Fungal spores produced asexually at the tops or sides of hyphae are called
a) Chlamydospores
b) Conidia
c) Zoospores
d) Spores

40) A mycelium which shows the phenomenon of having different kinds of nuclei in the same mycelium is called
a) Monokaryotic
b) Heterokaryotic
c) Dikaryotic
d) Heterozygous

41) A dark brown compact mass of mycelium which acts as a resting body is called as
a) Sclerotium
b) Chlamydospores
c) Rhizomorph
d) None of these

42) Which of the following is a famous Indian mycologist?
a) A.K.Sharma
b) Sadasivan
c) M.O.P. Iyenger
d) P. Maheswari

43) Molds, yeasts and mushrooms differ from other plants in that they
a) Lack cell wall
b) Reproduce by sexual means alone
c) Do not photosynthesise
d) Are aquatic

44) The mycelium of phycomycetes is
a) Monokaryotic
b) Aseptate
c) Dikaryotic
d) Septate

45) Which of the following groups contain typically coenocytic forms?
a) Liverworts
b) Chlorophyceae
c) Lichens
d) Phycomycetes

46) White rust of crucifers is caused by
a) Phytophthora
b) Albugo
c) Ustilago
d) Puccinia

47) Late blight of potato is caused by
a) Albugo candida
b) Fusarium moniliforme
c) Phytophthora infestans
d) Alternaria solani

48) Which of the following is called common bread mould?
a) Erysiphe
b) Rhizopus
c) Aspergillus
d) Penicillium

49) Which of the following features is not associated with Rhizopus?
a) Uredospores
b) Sporangiophore
c) Columella
d) Filamentous hyphae

50) Black mould is the common name for
a) Neurospora
b) Aspergillus
c) Penicillium
d) Rhizopus

51) Coenogametes are found in
a) Ustilago
b) Puccinia
c) Rhizopus
d) Penicillium

52) Rhizopus is
a) An obligatory parasite
b) A saprophyte
c) A parasite
d) An epiphyte

53) In which of the following plants is a columella present in the sporangium?
a) Spirogyra
b) Rhizopus
c) Yeast
d) Ulothrix

54) Generally in the laboratory culture of Rhizopus, there is no formation of zygospores because
a) Of the presence of (+) and (-) strains in the mycelium
b) Of the absence of (+) and (-) strains in the mycelium
c) There is deficiency of oxygen
d) There is deficiency of light

55) Motile sperms are absent in
a) Fern
b) Cycas
c) Funaria
d) Rhizopus

56) Yeast is included in
a) Phycomycetes
b) Ascomycetes
c) Basidiomyctes
d) Deuteromycetes

57) Yeasts are abundantly found in
a) Organic substances rich in fats
b) Organic substances rich in sugar
c) Moist bread
d) Horse dung

58) Yeasts and Penicillium are included under
a) Phycomycetes
b) Ascomycetes
c) Basidiomycetes
d) Myxomycetes

59) Yeast cells are rich in vitamin
a) A
b) B
c) C
d) D

60) Fungi usually producing 8 spores in a sac-like structure belong to
a) Basidiomycetes
b) Ascomycetes
c) Phycomycetes
d) Deuteromycetes

61) An open ascocarp is termed a
a) Perithecium
b) Cleistothecium
c) Hysterothecium
d) Apothecium

62) Yeast is unlike bacteria in being
a) Multicellular
b) Prokaryotic
c) Eukaryotic
d) Unicellular

63) Yeast is different from other fungi in being
a) Unicellular and either haploid or diploid
b) Multicellular and haploid
c) Unicellular and haploid
d) Unicellular and diploid

64) Vegetative reproduction in yeast takes place by
a) Budding
b) Akinetes
c) Aplanospores
d) Ascospores

65) Filaments of sterile cells interspersed with asci or basidia are called
a) Paraphyses
b) Trichomes
c) Peridium
d) Periphyses

66) A flask-shaped fruiting body of ascomycetes is called a/an
a) Sclerotium
b) Apothecium
c) Cleistothecium
d) Perithecium

67) Which of the following enzymes is secreted by yeast, and is responsible for fermentation?
a) Enolase
b) Dehydrogenase
c) Zymase
d) Invertase

68) Which of the following is not pathogenic?
a) Yeast
b) Albugo
c) Altemaria
d) Ustilago

69) One of the following is used in the baking of the bread:
a) Rhizopus stolonifer
b) Zygosaccharomyces octosporous
c) Saccharomyces cerevisiae
d) Saccharomycodes ludwigii

70) Yeasts are economically very important because they
a) Are used in the tea and tobacco industries
b) Are used in the wine and baking industries
c) Spread plant diseases
d) Spread animal diseases

71) Bread is soft and porous after the addition of yeast cells to the lump of wheat flour, because
a) Yeast produces benzoic acid
c) Yeast is soft and flour also becomes soft
d) Yeast produces acetic acid and alcohol which give softness to the bread

72) Fruit juices turn bitter if they are kept in an open place for a long time, because
a) Bacteria of the atmosphere react with the juices
b) Fermentation of the juice occurs by the action of yeast
c) Some internal factors
d) All the above three statements are correct

73) Yeast is not used in the manufacture of
a) Penicillin
b) Baking breads
c) Toddy
d) Wine

74) Yeast is used in the production of
a) Acetic acid
b) Cheese
c) Curd
d) Ethyl alcohol

75) Which of the following is commonly called a blue-mould?
a) Penicillium
b) Peziza
c) Aspergillus
d) Erysiphe

76) The hyphae of Aspergillus are
a) Septate and multinucleate
b) Septate and uninucleate
c) Aseptate and multinucleate
d) Aseptate and uninucleate

77) The fruiting body of Aspergillus is termed as
a) Cleistothecium
b) Hypanthodium
c) Apothecium
d) Perithecium

78) The commercial source of citric acid is
a) Aspergillus
b) Penicillium
c) Citrus fruits
d) Bacteria

79) During asexual reproduction, Penicillium produces
a) Zoospore
b) Conidiospore
c) Ascospore
d) Basidiospore

80) Penicillium is economically important because it
a) Spoils food materials
b) Provides antibiotics
c) Causes disease
d) Is used in the preparation of alcohol

81) Penicillin was discovered by
a) S.Waksman
b) Robert Koch
c) Alexander Fleming
d) P.Ehrlich

82) What is Penicillium?
a) Virus
b) Alga
c) Fungus
d) Bacterium

83) Aflatoxin is produced by
a) A bacterium
b) A virus
c) A fungus- Aspergillus flavus
d) A nematode

84) Ergot is obtained from
a) Rhizobium
b) Claviceps
c) Phytomonas
d) Albugo

85) Which of the following is a heteroecious fungus?
a) Ustilago
b) Puccinia
c) Albugo
d) Phytophthora

86) The binucleate spores of Puccinia graminis released from barberry leaves, and responsible for initial infection in a wheat plant are called
a) Pycniospores
b) Aeciospores
c) Uredospores
d) Teleutospores

87) Which of the following workers was famous for his work on wheat rust?
a) A.F. Blakeslee
b) K.C. Mehta
c) C.A. Bessey
d) H.C. Bold

88) Black rust of wheat is caused by
a) Yeast
b) Penicillium
c) Puccinia
d) Rhizopus

89) The fungal tissue forming the central core of a gill of mushrooms is called the
a) Trama
b) Stroma
c) Hymenium
d) Sub-hymenium

90) A mushroom is a
a) Facultative parasite
b) Saprophyte
c) Obligatory parasite
d) chemosynthetic organism

91) Which of the following is a fungus used as food?
a) Mucor
b) Penicillium
c) Agaricus
d) Rhizopus

92) Agaricus cannot manufacture its own food because
a) It does not have leaves
b) It lacks chlorophyll
c) It does not need food
d) It does not have roots

93) Fungi imperfecti (Deuteromycetes) lack
a) Hyphae
b) Spores
c) Asexual reproduction
d) Sexual reproduction

94) Sexual reproduction is absent in
a) Basidiomycetes
b) Deuteromycetes
c) Phycomycetes
d) Ascomycetes

95) Ringworm of the scalp is caused by
a) Aspergillus
b) Microsporum
c) Alternaria
d) Penicillium

96) One of the common fungal diseases of man is
a) Plague
b) Ringworm
c) Cholera
d) Typhoid

97) Which of the following is a fungicide?
a) Bordeaux mixture
b) D.D.T
c) 2-4, D
d) None of these

98) Which of the following pairs are unrelated?
a) Petal and Corolla
b) Rhizome and stem
c) Ascocarp and archegonium
d) Stele and vascular bundle

99) Which of the following disease is caused by a fungus?
a) Tuberculosis
b) Black rust of wheat
c) Small pox
d) Cancer

100) The severe 1942-43 famine of West Bengal was due to infection of the rice crop by a fungus called
a) Penicillium
b) Helminthosporium
c) Rhizopus
d) Puccinia


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