Q: Which observation proves that a cell is a eukaryote?
1. It contains DNA
2.It contains ribosomes
3.It has a cell membrane
4. It has DNA inside a nucleus
4. “It has DNA inside a nucleus”
Eukaryotic cells all have a nucleus. Eukaryotes are organisms that are multicellular, although there are some examples of single cellular eukaryotes. So eukaryotic cells can be either cell with a nucleus or a eukaryotic organism’s cell. The most important feature to judge whether it has nucleus membrane. And for other choices, they are the common features of eukaryote and prokaryote.