Nucleoid area a. There is often also some extrachromosomal DNA - episomes, plasmids. Like those in mammalian cells, only smaller, but present in larger numbers. B. Structures found in only some bacteria 1. Pili and Fimbriae Fig 4.10 a.
Spore wall contains layers of protein, calcium, dipicolinic acid.
High concentration of cys S-S cys and calcium salt of dipicolinic acid provides heat resistance.