Biological classification MCQs with Answers

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

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

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

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

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

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

Question-4. Binomial nomenclature was given by

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

Question-5. Comma shaped bacteria are known as

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

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

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

Question-7. Potato spindle tuber disease is caused by

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

Question-8. Quinine is obtained from

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

Question-9. Red tides in sea appear due to

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

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

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

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

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

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

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

Question-13. The two kingdom Classification was given by

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

Question-14. Trypanosoma causes

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-22. A taxon is

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

Question-23. Absorptive heterotrophic nutrition is exhibited by

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

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

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

Question-25. African sleeping sickness is due to

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

Question-26. Amoebiasis is prevented by

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

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

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

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

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

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

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

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

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

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

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

Question-32. Binomial nomenclature consists of two words

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

Question-33. Binomial nomenclature means

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

Question-34. Black rust of wheat is caused by

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

Question-35. Cauliflower mosaic virus contains

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

Question-36. Choose the correct match

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

Question-37. Claviceps purpurea is causal organism of

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

Question-38. Decomposers are organisms that

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

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

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

Question-40. Entamoeba coli causes

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

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

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

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

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

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

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

Question-44. Genetic information in Paramecium is contained in

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

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

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

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

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

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

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

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

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

Question-49. In Amoeba and Paramecium osmoregulation occurs through

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

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

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

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

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

Question-52. In fungi stored food material is

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

Question-53. In prokaryotes, the genetic material is

1. linear DNA with histones
2. circular DNA without histones
3. linear DNA without histones
4. circular 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. Monera
2. Fungi
3. Plantae
4. Protista

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

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

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

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

Question-57. Influenza virus has

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

Question-58. Interferons are

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

Question-59. Interferons are synthesized in response to

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

Question-60. Linnaeus evolved a system of nomenclature called

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

Question-61. Malaria fever coincides with liberation of

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

Question-62. Malignant tertian malaria is caused by

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

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

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

Question-64. Most of the lichens consist of

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

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

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

Question-66. Nitrogen fixer soil organisms belong to

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

Question-67. Non-symbiotic nitrogen fixers are

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

Question-68. Nuclear dimorphism is shown by

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

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

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

Question-70. Phenetic classification is based on

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

Question-71. Phenetic classification of organisms is based on

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

Question-72. Phylogenetic classification is based on

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

Question-73. Plant decomposers are

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

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

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

Question-75. Puccinia forms

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

Question-76. Reverse transcriptase is

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

Question-77. Rickettsiae constitute a group under

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

Question-78. Sequence of taxonomic categories is

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

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

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

Question-80. Species is

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-87. The plasmid

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

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

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

Question-89. The term antibiotic was first used by

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

Question-90. The term Phylum was given by

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

Question-91. The vector for sleeping sickness is

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

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

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

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

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

Question-94. Trypanosoma belongs to class

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

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

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

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

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

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

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

Question-98. What is true about Trypanosoma?

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

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

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

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

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

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

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

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

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

Question-103. Which one belongs to Monera?

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

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

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

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

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

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

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

Question-107. White rust disease is caused by

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

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

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