At the chemical level, the DNA of prokaryotic cells, which have no nuclear membranes, and that of eukaryotic cells, which have separate, membrane-enclosed nuclei, is identical. DNA is a long, double-stranded molecule containing a backbone of repeating, alternating sugar and phosphate units.
Simple cuboidal epithelium is a type of epithelial tissue found in the body. It is a single layer thick and made of cube-shaped cells. This type of tissue is found lining parts of the body such as the kidney tubules and walls of respiratory bronchioles.
Stratified cuboidal epithelium. - multiple layers of cuboidal cells. - found in glands of the body; reproductive glands, sweat glands, & mammary glands. - used to produce hormones (males & females) and sperm in males. - found in ovarian follicles and seminiferous tubules of the testes. Transitional epithelium.