. The smallest living cells with cell wall are

A: Mycoplasma

B: Viroids

C: Blue - green Algae

D: Bacteria


Best Answer

Ans: The correct answer is D Bacteria. 


The organisms' sizes vary greatly. Mycoplasma is the smallest unicellular organism on the planet. Bacteria, which include blue-green algae, are the most numerous of all prokaryotes. Mycoplasma does not have a cell wall. Bacterial cell membranes are distinct.

A: Mycoplasma- The smallest living cells are members of Kingdom monera. Mycoplasma is the smallest living cell on the planet, but it lacks a cell wall. These are unicellular organisms that can survive in the absence of oxygen.

B: Viroids- The viroids are extremely small, with genomes ranging from 246 to 467 nucleotides long. They are found primarily in plants. They are not encased in an outer envelope.

C: Blue-green Algae- Blue-green algae, also known as cyanobacteria, range in size from 0.5 to 0.6mm. It is the largest prokaryotic organism.

D: Bacteria- Bacteria are single-celled, microscopic organisms. They are known as prokaryotes. They don't have a nucleus. They are protected by two layers of cells: an outer cell wall and an inner cell membrane. Bacterial cells are one-tenth the size of eukaryotic cells. Bacteria range in size from 0.5 to 5.0 micrometers in length. Bacteria are the smallest living cells with a cell wall and are classified as microorganisms. Based on the information presented above, bacteria are the smallest living cells with a cell wall.

Hence, the correct answer is Bacteria.



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