Biological Classification Multiple Choice Question and Answers

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Biological Classification Multiple Choice Questions

Question 1. Viroids differ from viruses in having—

  1. DNA molecules without protein coat
  2. RNA molecules with protein coat
  3. RNA molecules without protein coat
  4. DNA molecules with protein coat

Answer: 3. RNA molecules without protein coat

Question 2. Which of the following are found in extreme saline conditions?

  1. Eubacteria
  2. Cyanobacteria
  3. Mycobacteria
  4. Archaebacteria

Answer: 4. Archaebacteria

Read and Learn More WBCHSE Multiple Choice Question and Answers for Class 11 Biology

Question 3. Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

  1. Pseudomonas
  2. Mycoplasma
  3. Nostoc
  4. Bacillus

Answer: 2. Nostoc

Question 4. The primary producers of the deep-sea hydrothermal vent ecosystem are—

  1. Blue-green algae
  2. Coral reefs
  3. Green algae
  4. Chemosynthetic bacteria

Answer: 4. Chemosynthetic bacteria

Question 5. The primary prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the—

  1. Thermoacidophiles
  2. Methanogens
  3. Eubacteria
  4. Halophiles

Answer: 2. Methanogens

Question 6. Which one of the following is wrong for fungi?

  1. They are heterotrophic
  2. They are both unicellular and multicellular
  3. They are eukaryotic
  4. All fungi possess a purely cellulosic cell wall

Answer: 4. All fungi possess a purely cellulosic cell wall

Question 7. Methanogens belong to—

  1. Dinoflagellates
  2. Slime moulds
  3. Eubacteria
  4. Archaebacteria

Answer: 4. Archaebacteria

Question 8. Select the wrong statement.

  1. Diatoms are chief producers in the oceans
  2. Diatoms are microscopic and float passively in water
  3. The walls of diatoms are easily destructible
  4. Diatomaceous earth is formed by the cell walls of diatoms.

Answer: 3. The walls of diatoms are easily destructible

Question 9. Select the mismatch.

  1. Protists- Eukaryotes
  2. Methanogens- Prokaryotes
  3. Gas vacuoles- Green bacteria
  4. Large central vacuoles- Animal cells

Answer: 4. Large central vacuoles- Animal cells

Question 10. Select the wrong statement.

  1. Cyanobacteria lack flagellated cells
  2. Mycoplasma is a wall-less microorganism
  3. Bacterial cell wall is made up of peptidoglycan
  4. Pili and fimbriae are mainly involved in motility of bacterial cells

Answer: 4. Pili and fimbriae are mainly involved in motility of bacterial cells

Question 11. Which of the following statements is wrong for Viroids?

  1. They are smaller than viruses
  2. They cause infections
  3. Their RNA is of high molecular weight
  4. They lack a protein coat

Answer: 1. They are smaller than viruses

Question 12. One of the major components of cell wall of most fungi is-

  1. Chitin
  2. Peptidoglycan
  3. Cellulose
  4. Hemicellulose

Answer: 1. Chitin

Question 13. Which of the following is not a feature of the plasmids?

  1. Circular structure
  2. Transferable
  3. Single-stranded
  4. Independent replication

Answer: 4. Independent replication

Question 14. Which of the following would appear as the pioneer organisms on bare rocks?

  1. Lichens
  2. Liverworts
  3. Mosses
  4. Green algae

Answer: 1. Lichens

Question 15. Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom —

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

Answer: 2. Protista

Question 16. Choose the wrong statement—

  1. Yeast is unicellular and useful in fermentation
  2. Penicillium is multicellular and produces antibiotics
  3. Neurospora is used in the study of biochemical genetics
  4. Morels and truffles are poisonous mushrooms

Answer: 4. Morels and truffles are poisonous mushrooms

Question 17. Cell wall is absent in—

  1. Nostoc
  2. Aspergillus
  3. Fun aria
  4. Mycoplasma

Answer: 4. Mycoplasma

Question 18. In which group of organisms the cells walls form two thin overlapping shells which fit together?

  1. Slime moulds
  2. Chrysophytes
  3. Euglenoids
  4. Dinoflagellates

Answer: 2. Chrysophytes

Question 19. Select the wrong statement—

  1. Mosaic disease in tobacco and AIDS in human being are caused by viruses
  2. The viroids we discovered by D.J. Ivanowski
  3. W.M. Stanley showed that viruses could be crystallized
  4. The term contagium vivum fluidum was coined by M.W. Beijerinek

Answer: 2. The viroids we discovered by D.J. Ivanowski

Question 20. The structures that help some bacteria to attach to rocks and/or host tissues are

  1. Holdfast
  2. Rhizoids
  3. Fimbriae
  4. Mesosomes

Answer: 3. Fimbriae

Question 21. The imperfect fungi which are decomposers of litter and help in mineral cycling belong to—

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

Answer: 2. Deuteromycetes

Question 22. Which the following are most suitable indicator of S02 pollution in the environment?

  1. Fungi
  2. Lichens
  3. Conifers
  4. Algae

Answer: 2. Lichens

Question 23. Pick up the wrong statement—

  1. Nuclear membrane is present in Monera
  2. Cell wall is absent in Animalia
  3. Protista have photosynthetic an heterotrophic modes of nutrition
  4. Some fungi are edible

Answer: 1. Nuclear membrane is present in Monera

Question 24. Five kingdom system of classification suggested by RH Whittaker is not based on

  1. Presence or absence of a well defined nucleus
  2. Mode of reproduction
  3. Mode of nutrition
  4. Complexity of body organisation

Answer: 1. Presence or absence of a well defined nucleus

Question 25. Archaebacteria differ from eubacteria in—

  1. Cell membrane structure
  2. Mode of nutrition
  3. Cell shape
  4. Mode of reproduction

Answer: 1. Cell membrane structure

Question 26. Which of the following shows coiled RNA strand and capsomeres?

  1. Polio virus
  2. Tobacco mosaic virus
  3. Measles virus
  4. Retrovirus

Answer: 2. Tobacco mosaic virus

Question 27. Viruses have—

  1. DNA enclosed in a protein coat
  2. Prokaryotic nucleus
  3. Single chromosome
  4. Both DNA and RNA

Answer: Both DNA and RNA

Question 28. Identify the correct sequence of events in the viral replication process.

  1. Eclipse
  2. Maturation
  3. Adsorption
  4. Assembly
  5. Penetration
  6. Lysis

(1), (2), (3), (4), (5), (6)

(2), (1), (3), (4), (5), (6)

(3), (5),(1), (2), (4), (6)

(3), (5), (6), (4), (2), (1)

Answer: 3. Adsorption

Question 29. As per Whittaker’s classification, an organism possessing eukaryotic cell structure, multicellular organisation, with a cell wall and nuclear membrane showing heterotrophic nutrition can be placed under the kingdom—

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

Answer: 4. Animalia

Question 30. Which of the following does not apply to Ascomycetes?

  1. Mycelium coenocytic and aseptate
  2. Commonly known as sac fungi
  3. Asexual spores called conidia are produced exogenously
  4. Sexual spores called ascospores are produced endogenously
  5. They are saprophytic, decomposers, parasitic or coprophilous

Answer: 1. Mycelium coenocytic and aseptate

Question 31. Which of the following groups of organisms have a protein rich layer called pellicle?

  1. Chrysophytes
  2. Euglenoids
  3. Dinoflagellates
  4. Slime moulds
  5. Protozoans

Answer: 2. Euglenoids

Question 32. Identify the correct pairs of combination

Viroid — Bovine spongiform encephalitis.

Prion — Creutzfeldt-Jakob disease.

Measles virus — Glycoprotein projections.

Rabies virus Polyhedral symmetry.

  1. (3) and (4)
  2. (1) and (3)
  3. (1) and (2)
  4. (2) and (3)

Answer: 4. (2) and (3)

Question 33. The protozoan with heliopodia as locomotory structures

  1. Actinophryx
  2. Entamoeba
  3. Entamoeba
  4. Euglypha

Answer: 1. Actinophryx

Question 34. The type of syngamy seen in Trichonympha is—

  1. Hologamy
  2. Anisogamy
  3. Isogamy
  4. Conjugation

Answer: 1. Hologamy

Question 35. Protists obtain their food as—

  1. Photosynthesisers
  2. Chemosynthesisers
  3. Heterotrophs
  4. Both 1 and 2

Answer: 4. Both 1 and 2

Question 36. Which of the following does not belong to kingdom—Protista?

  1. Chrysophytes
  2. Euglenoids
  3. Ascomycetes
  4. Dinoflagellates
  5. Protozoans

Answer: 3. Dinoflagellates

Question 37. Bacteria differ from plants in that they do not have—

  1. DNA
  2. RNA
  3. Cell wall
  4. A well defined nucleus

Answer: 4. A well defined nucleus

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