All of the Following are True Statements About Bacterial S-Layers

Question

All of the following are true statements about bacterial S-layers EXCEPT that they
A) are commonly found in Gram-positive cells as well as in archaea.
B) are a crystalline layer consisting of protein or glycoprotein.
C) present a formidable physical barrier to predators or parasites.
D) are found in bacteria freshly isolated from natural sources.
E) are found in bacteria isolated from laboratory cultures.

Accepted Answer

S-layers are often lost in bacteria that are repeatedly cultured in laboratory conditions, as they are not necessary for survival in such controlled environments.