A bacterial cell consists of following components
Cell envelope It is the outer covering of protoplasm of
bacterial cell. It contains mucilage sheath, cell wall and
plasma membrane.
Cytoplasm It is a crystallo colloidal complex that forms
the protoplasm excluding its nucleoid. Membrane bound
cell organelles are absent. Cytoplasm along with nucleoid
are together called as protoplasm.
Nucleoid It represents the genetic material of
prokaryotes. Nucleoid consists of a single circular strand of
DNA duplex which is super coiled with the help of RNA
No nuclear envelope is present.
Plasmids These are self-replicating. extrachromosomal
segments of double-stranded, circular, naked DNA.
Flagella These are unstranded, equivalent to a single
microtubular fibre. These help in movement and
locomotion.
Pili and fimbriae Pili are longer, fewer and thicker
tubular outgrowths made up of protein pilin. Fimbriae are
small bristle-like fibres sprouting from cell surface in large
number. Pili are helpful in attaching to recipient cell and
forming conjugation tube. Fimbriae cause agglutination of
RBC. also help in mutual clinging of bacteria.