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.

Question

Quizplus · 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.

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