Please ans. the question which is attached. Please........................

Dear Parth
 
Viral fibrous protein part of the virion fiber, which is a thin long rod like structure, unique or multiple, appended to the tail of prokaryotic viruses and used for attachment to the host cell. Shorter appendages are called tail spikes (e.g. Podoviridae) or whiskers
 
Regards
Arun (askIITians forum expert)

Tail fibres are made of specific proteins designed to target specific host cells