Gene Regulation: Lac Operon

Question 1

Lambda phage fact file

Answer 1

Most abundant biological entity on earth
50 million phage particles per ml of sea water
Only infects E. coli
Circular dsDNA, icosahedral head of 50-60nm diameter. Has a set of flexible tail fibres (150nm)
Tail fibres + J protein allow phage to bind to host surface
Has lytic and lysogenic lifestyles