The geneticmaterial of the virus is surrounded by a protein capsid which protects it from the environment and host immune system.
.The capsid (envelope) has "spikes", which represent attachment (envelope) proteins, sticking out of it. These attachment proteins help the virus attach to and infect a host cell.
A virus
Mesosomes - infolding of membrane which contains enzymes for cellular reactions
Flagella for movement
Cell wall - made from peptidoglycan
Pili/pilus - hair like structure which attaches to other bacterial cells
Plasmid - circular pieces of DNA, carries genes for replication