Question

Which of the following organisms does not have cell wall as outermost covering?
O E.coli
Nostoc
O Paramoecium
O Clostridium

Answer 1

Answer:

Coli Nostoc

Explanation:

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Answer 2

The organisms do not have a cell wall as the outermost covering is Paramoecium.

• Paramoecium is the protists and is a unicellular eukaryote.
• Protists are characteristic in that they are photosynthetic and cell walls may be present or absent.
• In paramecium elastic layer covers the plasma membrane in place of the cell wall. this covering is known as a pellicle. so, the cell wall is absent in paramoecium.
• E. coli, nostoc and clostridium are bacteria and they have cell walls.
• The cell wall of E.colu consists of lipopolysaccharides, the cell wall of clostridium is composed of peptidoglycan while the cell wall of nostoc is cellulosic.