Zinc is also present in some denture adhesive creams at levels ranging from 17â34 mg/g [17]. While use of these products as directed (0.5â1.5 g/day) is not of concern, chronic, excessive use can lead to zinc toxicity, resulting in copper deficiency and neurologic disease.
If you're looking to learn about cells with a nucleus, this is the wrong place. Prokaryotes do not have an organized nucleus. Their DNA is kind of floating around the cell. It's clumped up, but not inside of a nucleus. If you want to learn about cells with a nucleus, look for information on eukaryotes. And, once again, a prokaryote is a single cell or organisms that does NOT have organized nuclei.
A prokaryote is a single-celled organism that doesn't have a  membrane-bound nucleus. Escherichia coli, a kind of bacteria that  can be dangerous to humans, is an example. it is nucleus. A eukaryote is a single celled organism have a nucleus. Different  types of eukaryotic cells are found in plants and animals.