Molecules :
membranes are mostly fats,
most everything else is proteins.
DNA is mainly sugars.
cell membrane
Ribosomes are the cell structures made up mainly of globular RNA. Ribosomes are responsible for protein synthesis in the cell.
ribo nucleaic acids
These are known as and are called Chromosomes.
Two structures found in a plant cell but not in an animal cell are chloroplasts, which are responsible for photosynthesis, and a cell wall made of cellulose, which provides structural support and protection to the cell.
Chromosomes are the threadlike structures that are made up of proteins and DNA. Chromosomes are found in the nucleus of the cell.
ribosomes
Yes, how else could the cell live. Cell membranes have structures (holes) in them to allow things to move in and out. These holes are special structures in the membrane and they "control" what goes across the membrane. I have made a link below to a diagram of the cell membrane to show some of these structures.
chromosomes
Yes, all animal life is comprised of cell structures.
The group of prokaryotes with strong cell walls and a variety of structures is the bacteria. Bacteria have cell walls made of peptidoglycan, which provides strength and structure to the cell. Bacteria exhibit diverse shapes and structures, from cocci (spherical) to bacilli (rod-shaped) to spirilla (spiral-shaped).
PROTEIN!!!!!!!!!!!!!!!!!!!!!!!!!