The function of polysome in bacterial cell is to

A. Concerned with lipid and steroidal hormone synthesis
B. Outer non-living rigid structure which gives shape to the cell and protects from mechanical damage and infection.
C. Both lie perpendicular to each other and each has an organisation like the cartwheel.
D. Responsible for trapping light energy for the synthesis of sugar.
E. Present in cells actively involved in protein synthesis and secretion.
F. Spherical structures, rich in hydrolytic enzymes.

Identify the structures marked as $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ w.r.t fluid mosaic model of plasma membrane