Question

what is cell membrane and nuclear structure​

Answer 1

Answer:

Cell membrane is a cell organelle that prevents the harmful materials to enter the cell. It also have a selectively permeable membrane through which essential materials is taken by the process called diffusion.

Answer 2

Answer:

Cell membrane is the outermost layer of an animal cell ,it is a semi permissible membrane which allows only selective material to enter the cell,it provides shape to the cell,it is also present in plant cell but under cell wall,it is also called plasma membrane, it is made up of lipid(fat) and protein which is also called phospholipid.

Structure of nucleus ,I have given ,hope it helps.