Major groups of microorganisms Objective Question

1. The classification begun by Carl Woese was based on the comparison of:

  • a) t-RNA sequences
  • b) m-RNA sequences
  • c) r-RNA sequences
  • d) DNA sequences

2.On the basis of r-RNA classification, microbes are classified in which group?

  • a) Bacteria, Archaea, Plantae
  • b) Bacteria, Archaea, Monera
  • c) Bacteria, Archaea, Eucarya
  • d) All of the above

3.Which of the following is true for Archaea?

  • a) They are non pathogenic
  • b) Lack peptidoglycan in cell wall
  • c) May be found in extreme environments
  • d) All of the above

4.Which of the following is not true for bacteria?

  • a) Usually have a single cell
  • b) Contain peptidoglycan in cell wall
  • c) All are highly pathogenic
  • d) Found in abundance in soil, water and air

5.What is the significant production of Cyanobacteria?

  • a) Water
  • b) Sulfur
  • c) Carbon dioxide
  • d) Oxygen

6.Algae and photosynthetic protists together produce around __ % of Oxygen on earth:

  • a) 35
  • b) 45
  • c) 75
  • d) 85

7.Unicellular and animal like protists are known as:

  • a) Virus
  • b) Bacteria
  • c) Algae
  • d) Protozoa

8.Which of the following is not true for protozoa?

  • a) Unicellular animal like protists
  • b) Obtain nutrition by ingestion
  • c) Found in intestinal tract of animals
  • d) Acting as main foundation of aquatic food chains

9.In different stages of life cycle slime molds resemble:

  • a) Protozoa and Algae
  • b) Algae and Bacteria
  • c) Protozoa and Fungi
  • d) Fungi and Algae

10.Which of the following is not true for fungi?

  • a) Ranges from unicellular yeast to multicellular mold
  • b) Can cause disease to human and plants
  • c) Mode of nutrition is ingestion
  • d) Can decompose dead organic material

11.Which of the following is true for viruses?

  • a) They are acellular entities
  • b) Smallest of all microbes
  • c) Always pathogenic
  • d) All of the above

12.Which of the following is not true for viruses?

  • a) They are obligate host parasites
  • b) They lack cellular structure
  • c) They are capable to cause cancer
  • d) They are only pathogenic to humans

13.The first human disease proved to have a viral cause was:

  • a) Rabies
  • b) Smallpox
  • c) AIDS
  • d) Hepatitis

14.Which disease is caused by virus?

  • a) Smallpox
  • b) Rabies
  • c) AIDS
  • d) All of the above

15. Phycology is the study of:

  • a) Fungi
  • b) Algae
  • c) Plants
  • d) Bacteria

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