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Q.

What is S-layer?

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a

Soluble layer

b

Solid layer

c

Secondary layer

d

Surface layer

answer is B.

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Detailed Solution

Concept: The S-layer is otherwise known as a surface layer. It is present in the cell wall of most of the Archaea bacteria. 

This layer is composed of proteins and glycoproteins. 

They are about a thickness of 5 to 25nm.

Hence, the correct option is 2.

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