Biological classification MCQs with Answers

Question-1. Yeast-Saccharomyces cerevisiae is used in the industrial production of

1. citric acid
2. tetracycline
3. ethanol
4. butanol

Question-2. According to five-kingdom classification, which of the following does not contain nuclear membrane?

1. Protista
2. Monera
3. Fungi
4. Animalia

Question-3. Bacteria that live in hot springs are called

1. Halophiles
2. Thermoacidophiles
3. Methanogens
4. None of the above

Question-4. Binomial nomenclature was given by

1. huxley
2. ray
3. darwin
4. linnaeus

Question-5. Comma shaped bacteria are known as

1. vibrio
2. spiral
3. coccus
4. spirillum

Question-6. If a scientist has to names a similar species he should study the

1. Holotype
2. syntype
3. mesotype
4. isotype

Question-7. Potato spindle tuber disease is caused by

1. Phycobionts
2. Virus
3. Bacteria
4. Viroids

Question-8. Quinine is obtained from

1. Puccinia
2. Neurospora
3. Gonyaulax
4. Cinchona

Question-9. Red tides in sea appear due to

1. Euglena
2. Chrysophytes
3. Dinoflagellates
4. Diatoms

Question-10. The asexual spores are not found, vegetative reproduction occurs by fragmentation and sexual organs are absent. Identify the class of fungi.

1. Phycomycetes
2. Ascomycetes
3. Basidiomycetes
4. Deuteromycetes

Question-11. The natural system of Classification is based on

1. morphology
2. evolutionary trend
3. anatomy
4. all of the above

Question-12. The scientist who created the group protista for both unicellular plants and animals is

1. haecke
2. pasteur
3. lister
4. koch

Question-13. The two kingdom Classification was given by

1. c.linnaeus
2. john ray
3. huxley
4. whittaker

Question-14. Trypanosoma causes

1. Dysentry
2. Mumps
3. Sleeping sickness
4. Cholera

Question-15. Two organisms of the same class but different families will be kept under the same

1. genera
2. species
3. order
4. family

Question-16. Which amongst kingdom animalia has become recently extinct?

1. snow leopard
2. indian macaque
3. cheetah
4. tiger

Question-17. Which of the following is an indicator of air pollution?

1. Mycorrhiza
2. Agaricus
3. Lichens
4. Common mushrooms

Question-18. Which of the following is not a viral disease?

1. AIDS
2. Herpes
3. Tuberculosis
4. Smallpox

Question-19. Which of the following is used in biochemical and genetic work?

1. Claviceps
2. Aspergillus
3. Neurospora
4. Mucor

Question-20. A non-photosynthetic aerobic nitrogen fixing soil bacterium is

1. Rhizobium
2. Clostridium
3. Azotobacter
4. Klebsiella

Question-21. A system of classification in which a large number of traits are considered, is

1. natural system
2. synthetic system
3. artificial system
4. phylogenetic system

Question-22. A taxon is

1. a group of related families
2. a group of related species
3. a type of living organisms
4. a taxonomic group of any ranking

Question-23. Absorptive heterotrophic nutrition is exhibited by

1. algae
2. fungi
3. bryophytes
4. pteridophytes

Question-24. Adhesive pad of fungi penetrates the host with the help of

1. mechanical pressure and enzymes
2. hooks and suckers
3. softening by enzymes
4. only by mechanical pressure

Question-25. African sleeping sickness is due to

1. Plasmodium vivax transmitted by tse-tse fly
2. Trypanosoma lewsii transmitted by bed bug
3. Trypanosoma gambiense transmitted by Glossina palpalis
4. Entamoeba gingivalis spread by house fly

Question-26. Amoebiasis is prevented by

1. eating balanced food
2. eating plenty of fruits
3. drinking boiled water
4. using mosquito nets

Question-27. An important criterion for modern day classification is

1. resemblances in Morphology
2. anatomical and physiological traits
3. breeding habits
4. presence or absence of notochord

Question-28. Azotobacter and Bacillus polymyxa are the examples of

1. symbiotic nitrogen-fixers
2. non-symbiotic nitrogen-fixers
3. ammonifying bacteria
4. disease-causing bacteria

Question-29. Bacteria is a group of prokaryotic organisms which is characterised by

1. All of the above
2. Simple structure and complex behaviour
3. 70 S ribosomes
4. Peptidoglycan cell wall

Question-30. Bacteria lack alternation of generation because there is

1. neither syngamy nor reduction division
2. distinct chromosomes are absent
3. no conjugation
4. no exchange of genetic material

Question-31. Basic unit or smallest taxon of taxonomy/ classification is

1. species
2. kingdom
3. family
4. variety

Question-32. Binomial nomenclature consists of two words

1. genus and species
2. order and family
3. family and genus
4. species and variety

Question-33. Binomial nomenclature means

1. one name given by two scientists
2. one scientific name consisting of a generic and a specific name
3. two names, one Latinised, other of a person
4. None of the above

Question-34. Black rust of wheat is caused by

1. Puccinia
2. Mucor
3. Aspergillus
4. Rhizopus

Question-35. Cauliflower mosaic virus contains

1. ssRNA
2. dsRNA
3. dsDNA
4. ssDNA

Question-36. Choose the correct match

1. Desmids ? Chrysophytes
2. Gymnodinium ? Hemicellulosic plates in wall
3. Euglena ? Chlorophyll a & c
4. Gonyaulax ? Red sea

Question-37. Claviceps purpurea is causal organism of

1. smut of barley
2. rust of wheat
3. ergot of rye
4. powdery mildew of pea

Question-38. Decomposers are organisms that

1. elaborate chemical substances, causing death of tissues
2. operate in living body and simplifying organic substances of cells step by step
3. attack and kill plants as well as animals
4. operate in relay terms, simplifying step by step the organic constituents of dead body

Question-39. During the formation of bread it becomes porous due to release of CO2 by the action of

1. yeast
2. bacteria
3. virus
4. protozoans

Question-40. Entamoeba coli causes

1. pyorrhoea
2. diarrhoea
3. dysentery
4. None of these

Question-41. Escherichia coli is used extensively in biological research as it is

1. easily cultured
2. easily available
3. easy to handle
4. easily multiplied in host

Question-42. Eubacteria can be differentiated from archaebacteria on the basis of

1. Cell wall
2. Ribosomes
3. Gene of tRNA
4. Nutrition

Question-43. First true phylogenetic system of classification was given by

1. Engler and Prantl
2. de Candolle
3. Eichler
4. de Jussiaeu

Question-44. Genetic information in Paramecium is contained in

1. micronucleus
2. macronucleus
3. Both a) & b)
4. mitochondria

Question-45. Genophore bacterial genome or nucleoid is made of

1. histones and nonhistones
2. RNA and histones
3. a single double stranded DNA
4. a single stranded DNA

Question-46. Human Immunodeficiency Virus (HIV) has a protein coat and a genetic material which is

1. single stranded DNA
2. single stranded RNA
3. double stranded RNA
4. double stranded DNA

Question-47. If all ponds and puddles are destroyed, the organism likely to be destroyed is

1. Leishmania
2. Trypanosoma
3. Ascaris
4. Plasmodium

Question-48. If two or more species occupy overlapping areas, they are

1. sibling
2. allochronic
3. keystone
4. sympatric

Question-49. In Amoeba and Paramecium osmoregulation occurs through

1. pseudopodia
2. nucleus
3. contractile vacuole
4. general surface

Question-50. In bacterial chromosomes, the nucleic acid polymers are

1. linear DNA molecule
2. circular DNA molecule
3. of two types-DNA and RNA
4. linear RNA molecule

Question-51. In five kingdom system, the main basis of classification is

1. mode of nutrition
2. asexual reproduction
3. structure of nucleus
4. structure of cell wall

Question-52. In fungi stored food material is

1. glycogen
2. starch
3. sucrose
4. glucose

Question-53. In prokaryotes, the genetic material is

1. circular DNA without histones
2. linear DNA without histones
3. circular DNA with histones
4. linear DNA with histones

Question-54. In the five-kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen-fixing bacteria and methanogenic archaebacteria?

1. Fungi
2. Plantae
3. Protista
4. Monera

Question-55. In which kingdom would you classify the archaebecteria and nitrogen-fixing organisms. If the five-kingdom system of classification is used ?

1. Monera
2. Fungi
3. Plantae
4. Protista

Question-56. In which one of the following pairs of diseases both are caused by viruses?

1. Tetanus and typhoid
2. Whooping cough and sleeping sickness
3. Syphilis and AIDS
4. Measles and rabies

Question-57. Influenza virus has

1. DNA
2. RNA
3. Both a) and b)
4. only proteins and no nucleic acids

Question-58. Interferons are

1. antiviral proteins
2. antibacterial proteins
3. anticancer proteins
4. complex proteins

Question-59. Interferons are synthesized in response to

1. mycoplasma
2. bacteria
3. viruses
4. fungi

Question-60. Linnaeus evolved a system of nomenclature called

1. mononomial
2. vernacular
3. binomial
4. polynomial

Question-61. Malaria fever coincides with liberation of

1. cryptomerozoites
2. metacryptomerozoites
3. merozoites
4. trophozoites

Question-62. Malignant tertian malaria is caused by

1. Plasmodium falciparum
2. P. vivax
3. P. ovale
4. P. malariae

Question-63. Most common type of genetic material present in bacteriophages is

1. ds DNA
2. ds RNA
3. ss RNA
4. ss DNA

Question-64. Most of the lichens consist of

1. blue-green algae and Basidomycetes
2. blue-green algae and Ascomycetes
3. red algae and Ascomycetes
4. brown algae and Phycomycetes

Question-65. Name the organisms which do not derive energy directly or indirectly from sun

1. chemosynthetic bacteria
2. pathogenic bacteria
3. symbiotic bacteria
4. mould

Question-66. Nitrogen fixer soil organisms belong to

1. mosses
2. bacteria
3. green algae
4. soil fungi

Question-67. Non-symbiotic nitrogen fixers are

1. Azotobacter
2. Pseudomonas
3. soil fungi
4. blue-green algae

Question-68. Nuclear dimorphism is shown by

1. Paramecium
2. Plasmodium
3. Amoeba
4. Trypanosoma

Question-69. On how many criteria living organisms have been classified into five kingdoms ?

1. Four
2. Three
3. Two
4. Five

Question-70. Phenetic classification is based on

1. Observable characteristics of existing organisms
2. Dendograms based on DNA characteristics
3. The ancestral lineage of existing organisms
4. Sexual characteristics

Question-71. Phenetic classification of organisms is based on

1. Observable characteristics of existing organisms
2. The ancestral lineage of existing organisms
3. Dendogram based on DNA characteristics
4. Sexual characteristics

Question-72. Phylogenetic classification is based on

1. utilitarian system
2. habits
3. overall similarities
4. common evolutionary descent

Question-73. Plant decomposers are

1. Monera and Fungi
2. Fungi and Plants
3. Protista and Animalia
4. Animalia and Monera

Question-74. Plasmodium, the malarial parasite, belongs to class

1. Sarcodina
2. Ciliata
3. Sporozoa
4. Dinophyceae

Question-75. Puccinia forms

1. uredia and aecia on wheat leaves
2. uredia and telia on wheat leaves
3. uredia and aecia on barbery leaves
4. uredia and pycnia on barbery leaves

Question-76. Reverse transcriptase is

1. RNA dependent RNA polymerase
2. DNA dependent RNA polymerase
3. DNA dependent DNA polymerase
4. RNA dependent DNA polymerase

Question-77. Rickettsiae constitute a group under

1. bacteria
2. viruses
3. independent group between bacteria and viruses
4. fungi

Question-78. Sequence of taxonomic categories is

1. class-phylum-tribe-order-family-genusspecies
2. division-class-family-tribe-order-genusspecies
3. division-class-order-family-tribe-genusspecies
4. phylum-order-class-tribe-family-genusspecies

Question-79. Small proteins produced by vertebrate cells naturally in response to viral infections and which inhibit multiplication of viruses are called

1. immunoglobulins
2. interferons
3. antitoxins
4. lipoproteins

Question-80. Species is

1. basic unit of classification
2. unit in the evolutionary history of a tree
3. specific class of evolution
4. not related to evolution

Question-81. Temperature tolerance of thermal blue-green algae is due to

1. cell wall structure
2. cell organization
3. mitochondrial structure
4. homopolar bonds in their proteins

Question-82. The chemical compounds produced by the host plants to protect themselves against fungal infection is

1. phytotoxin
2. pathogen
3. phytoalexins
4. hormone

Question-83. The closely related morphologically similar sympatric populations, but reproductively isolated, are designated as

1. clines
2. demes
3. clones
4. sibling species

Question-84. The infective state of malarial parasite Plasmodium that enters human body is

1. merozoite
2. sporozoite
3. trophozoite
4. minuta form

Question-85. The main difference in Gram (+)ve and Gram (-)ve bacteria resides in their

1. cell wall
2. cell membrane
3. cytoplasm
4. flagella

Question-86. The part of life cycle of malarial parasite Plasmodium vivax, that is passed in female Anopheles is

1. sexual cycle
2. pre-erythrocytic schizogony
3. exo-erythrocytic schizogony
4. post-erythroeytic schizogony

Question-87. The plasmid

1. helps in respiration
2. genes found inside nucleus
3. is a component of cell wall of bacteria
4. is the genetic part in addition to DNA in micro-organisms

Question-88. The practical purpose of classification of living organisms is to

1. facilitate identification of unknown organisms
2. name the living organisms
3. trace the evolution of living organisms
4. explain the origin of living organisms

Question-89. The term antibiotic was first used by

1. Fleming
2. Pasteur
3. Waksman
4. Lister

Question-90. The term Phylum was given by

1. Cuvier
2. Haeckel
3. Theophrastus
4. Linnaeus

Question-91. The vector for sleeping sickness is

1. house fly
2. tse-tse fly
3. sand fly
4. fruit fly

Question-92. Tobacco Mosaic Virus (TMV) genes are

1. double stranded RNA
2. single stranded RNA
3. polyribonucleotides
4. proteinaceous

Question-93. Tobacco mosaic virus is a tubular filament of size

1. 700 × 30 nm
2. 300 × 10 nm
3. 300 × 5 nm
4. 300 × 18 nm

Question-94. Trypanosoma belongs to class

1. Sarcodina
2. Zooflagellata
3. Ciliata
4. Sporozoa

Question-95. Ustilago caused plant diseases are called smuts because

1. they parasitise cereals
2. mycelium is black
3. they develop sooty masses of spores
4. affected parts become completely black

Question-96. Viruses are no more alive than isolated chromosomes because

1. both require the environment of a cell to replicate
2. they require both RNA and DNA
3. they both need food molecules
4. they both require oxygen for respiration

Question-97. Viruses that infect bacteria, multiply and cause their lysis, are called

1. lysozymes
2. lytic
3. lipolytic
4. lysogenic

Question-98. What is true about Trypanosoma?

1. Polymorphic
2. Monogenetic
3. Facultative parasite
4. Non-pathogenic

Question-99. Which of the following is not correctly matched?

1. Covered smut of barley - Ustilago nuda
2. Late blight of potato - Phytophthora infestans
3. Smut of bajra - Tolysporium penicillariae
4. Root knot disease - Meloidogyne javanica

Question-100. Which of the following processes are involved in the reproduction of protista?

1. Cell fusion and zygote formation
2. Spore formation and fragmentation
3. Budding and spore formation
4. Binary fission and fragmentation

Question-101. Which of the following statement about Mycoplasma is true:

1. They differ from viruses in being cellular in organisation
2. Insensitive to several antibiotics as they have 70S ribosomes
3. They can survive without photosynthetic pigments and genetic material
4. They are smallest, disease causing thin walled organisms

Question-102. Which of the following statements is not true for retroviruses?

1. DNA is not present at any stage in the life cycle of retroviruses
2. Retroviruses carry gene for RNA dependent DNA polymerase
3. The genetic material in mature retroviruses is RNA
4. Retroviruses are causative agents for certain kinds of cancer in man

Question-103. Which one belongs to Monera?

1. Amoeba
2. Escherichia
3. Gelidium
4. Spirogyra

Question-104. Which one of the following character was not used by R.H. Whittaker for biological classification ?

1. Physiological characters
2. Thallus organisation
3. Phylogenetic relationships
4. Cell structure

Question-105. Which one of the following micro-organisms is used for production of citric acid in industries?

1. Penicillium citrinum
2. Aspergillus niger
3. Rhizopus nigricans
4. Lactobacillus bulgaricus

Question-106. Which one of the following statements about viruses is correct?

1. Viruses possess their own metabolic system
2. Viruses contain either DNA or RNA
3. Viruses are facultative parasites
4. Viruses are readily killed by antibiotics

Question-107. White rust disease is caused by

1. Claviceps
2. Alternaria
3. Phytophthora
4. Albugo candida

Question-108. Who discovered Plasmodium in RBC of human beings?

1. Ronald Ross
2. Mendel
3. Laveran
4. Stephen