Eucaryotes

 Eucaryotes are types of cells which are more complex,bigger and contain differences in structure / function compared to average procaryotes.

Eucaryotes have one major difference,  they pack their DNA internally in what is known as the nucleus.

Around the nucleus, there is a nuclear envelope which contains nuclear pores. This membrane separates the nucleus from the cytoplasm surrounding it. (1)

Refference: (1) Alberts et al, B.A, 2008. Molecular Biology of The Cell. 5th ed. pg 26. new york: Garland Science.