Smallest free living organism area)PPLOsb)Bacteriac)Viroidsd)VirusCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Pelagibacter ubique is one of the smallest known free-living bacterium with a length of 0.37-0.89 μm and an average cell diameter of 0.12-0.20 μm. They also have the smallest free-living bacterium genome; 1.8Mbp, 1354 protein genes, 35 RNA genes.

Answer

PPLO->Pleuro pneumonia like organisms ...also known as Mycoplasmas...they r the smallest known free living organisms...they r without cell wall & can survive without O2..Option A is true...Refer biological classification chapter in Ncert...

Answer

Smallest free-living organisms are PPLOs. PPLO stands for 'pleuropneumonia-like organisms'. These are bacteria that lack a cell wall, making them unique from other bacteria. They are also very small, with a diameter of about 0.1-0.3 micrometers.

PPLOs were first discovered in the 1890s, but their true nature was not understood until the 1960s. They are found in a variety of environments, including soil, water, and animals. Some PPLOs are pathogenic and can cause diseases in livestock and humans, while others are harmless.

There are several reasons why PPLOs are considered the smallest free-living organisms:

- Lack of a cell wall: PPLOs are unique among bacteria in that they lack a cell wall. This makes them smaller and more flexible than other bacteria, which have rigid cell walls.
- Small genome: PPLOs have a very small genome compared to other bacteria. This means they have fewer genes and less genetic material overall, which may contribute to their small size.
- Minimal metabolism: PPLOs have a minimal metabolism, meaning they require very little energy to survive. This may also contribute to their small size.

Overall, PPLOs are fascinating organisms that have unique characteristics that set them apart from other bacteria. Their small size and lack of a cell wall make them an interesting area of study for microbiologists.

Answer

Pleuro Pneumomia like organisms or Mycoplasma are the smallest living organisms. They lack cell wall. Mycoplasmas measure only 0.3 to 0.8 µm in size.

Answer

A

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