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MCQs on Microorganisms

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1. The phospholipids present in cytoplasm membrane of the archaeo-bacteria is

  • phosphoglycerides
  • polyisoprenoid
  • polyisoprenoid branched chain lipids
  • none of the above

2. The oldest eukaryotic organisms are considered to be

  • diplomonads like Giardia
  • archaea
  • fungi
  • animals

3. The phospholipids present in cytoplasm membrane of eubacteria is mainly

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  • phosphoglycerides
  • polyisoprenoid
  • phospholipoprotein
  • D. none of these

4. Which were the investigators lived at the same time?

  • Koch and Pasteur
  • Darwin and Woese
  • Van Leeuenhoek and Ricketts
  • Berg and Hooke

5. The unifying feature of the archaea that distinguishes them from the bacteria is

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  • habitats which are extreme environments with regard to acidity
  • absence of a nuclear membrane temperature
  • presence of a cell wall containing a characteristic outer membrane
  • cytoplasmic ribosomes that are 70S

6. Mycoplasmas are different from the other prokaryotes by

  • presence of chitin in cell walls
  • presence of murrain in cell walls
  • presence of proteins in cell walls
  • absence of cell wall itself

7. Evolutionary relationships between groups of organisms are determined using which of the following type of information?

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  • Comparisons of nucleotide sequences
  • Comparisons of biochemical pathways
  • Comparisons of structural features
  • All of the above

8. Which of the following is not true for eukaryotic cells?

  • Nucleus is bounded by nuclear membrane
  • Chromosomes contain histones
  • Chloroplasts and mitochondria contains 70S ribosomes
  • Gas vacuoles are present

9. Which of the following is not true for prokaryotic organism?

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  • Nucleus is not bounded by nuclear membrane
  • Chromosomes does not contain histones
  • 80S ribosomes are distributed in cytoplasm
  • Cell wall contains peptidoglycan as one of the major component

10. Gram staining was introduced by

  • Christian gram
  • Alfred Gram
  • Robertcook
  • Louis Pasteur

11. Gram staining was introduced by

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  • Christian gram
  • Alfred Gram
  • Robertcook
  • Louis Pasteur

12. Various bacterial species can be subdivided into

  • subspecies
  • biovarieties
  • serovarieties
  • all of these

13. Living organisms have many complex characteristics. Which one of the following is shared by non-living matter as well?

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14. A newly discovered microscopic structure is hypothesized to be a living organism. Which of the following lines of evidence would support the contention that this organism may be alive?

  • It contains DNA
  • It is made of a single cell
  • It utilizes energy
  • All of these

15. Mycoplasmas, rickettsiae, and chlamydiae are

  • types of fungi
  • small bacteria
  • species of protozoa
  • forms of viruses

16. Which of the following structure is absent in eukaryotic cells?

  • Mitochondria
  • Chloroplasts
  • Golgi structure
  • Mesosome

17. Who was the inventor of the Petri dish?

  • R.J. Petri, an assistant of R. Koch
  • A famous French cook
  • Italian glass blower from Petri, Italy
  • None of the above

18. Which one is not studied in microbiology?

  • Bacteria
  • Animal behaviour
  • Fungi
  • Algae

19. A characteristic of protein synthesis in both the archaea and eukarya is

  • transcription and translation are coupled
  • translation is inhibited by diphtheria toxin
  • proteins are synthesized from D-, rather than L-, isomers of amino acids
  • the initiator tRNA is charged with N-formyl-methionine

20. Cell theory includes all of the following except

  • all organisms are composed of one or more cells
  • the cell is the most primitive form of life
  • the cell is the structural unit of life
  • cells arise by division of preexisting cells

Answers

1. polyisoprenoid branched chain lipids, 2. archaea, 3. phosphoglycerides, 4. Koch and Pasteur, 5. absence of a nuclear membrane temperature, 6. absence of cell wall itself, 7. All of the above, 8. Gas vacuoles are present, 9. 80S ribosomes are distributed in cytoplasm, 10. Christian gram, 11. Evolution, 12. all of these, 13. Molecules, 14. It utilizes energy, 15. small bacteria, 16. Mesosome, 17. R.J. Petri, an assistant of R. Koch, 18. Animal behaviour, 19. proteins are synthesized from D-, rather than L-, isomers of amino acids, 20. the cell is the most primitive form of life.

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