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? 

  • Option 1)

    Pseudomonas

  • Option 2)

    Mycoplasma 

  • Option 3)

    Nostoc 

  • Option 4)

    Bacillus 

 

Answers (1)

As we learnt in 

Mycoplasm / PPLO ( Pleuropneumonia like organism ) -

  • Smallest monerans
  • Unicellular, non – motile
  • Lack cell wall
  • Resistance to antibiotics that affect cell wall synthesis like penicillin.
  • Inhibited by antibiotics like tetracycline which acts on metabolic pathways.
  • DNA is linear, double stranded extending almost throughout the cell.

- wherein

 

 


Option 1)

Pseudomonas

Incorrect

Option 2)

Mycoplasma 

Correct

Option 3)

Nostoc 

Incorrect

Option 4)

Bacillus 

Incorrect

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