What exactly is a cell?

what a cell is...

Its the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic. The image to the right is a human Cell----->

What is a prokaryote & a eukaryote ?

Prokaryotic cells do not contain a nucleus or any other membrane bound organelle.

Examples of prokaryotes are bacteria.
Eukaryote - cells contain membrane bound organelles, including a nucleus. Examples of eukaryotes cells are humans, plants, fungi, and insects.

Similarities between prokaryote & eukaryote cells.

They can regulate transport across a cell membrane and require chemical energy for some cellular processes.They both contain DNA and can both reproduce. They transcribe DNA into RNA and translate RNA into proteins on ribosomes.

Cell Reproduction.

    Eukaryotic Cell Reproduction. The life of eukaryotic cells is a cell cycle with two major phases - Interphase and the cell division. During the interphase, the cell takes in nutrients, grows, and duplicates its chromosomes.

    Prokaryotic cells reproduce by binary fission. The DNA in the cells is contained in a single circular chromosome.The reproductive process starts with the replication of the chromosome