Question

Example for bacteria that does not possess a cell wall is :

• A. Micrococci
• B. Myco bacterium
• C. Mycoplasma
• D. Spirochaetes

Answer 1

Answer:

C. Mycoplasma

• Mycoplasma is the smallest known living prokaryotic organism that completely lacks a cell wall.
• Because they lack a cell wall, they exhibit pleomorphism, meaning they can change their shape and size depending on environmental conditions.
• Mycoplasma are resistant to common antibiotics like penicillin, because penicillin works by inhibiting the synthesis of the peptidoglycan layer in bacterial cell walls.
• They were first discovered by Nocard and Roux in 1898 in the pleural fluid of cattle suffering from bovine pleuropneumonia.
• They are often described as the 'Jokers of the Microbiology' due to their ability to alter their shape and their resistance to many cell-wall targeting antibiotics.
• Mycoplasma pneumoniae is a well-known pathogen that causes atypical pneumonia in humans.
• They are facultative anaerobes or obligate aerobes and can survive as saprophytes or parasites.