Final answer:
A distinctive feature of eukaryotic cells is the organization of chromosomal DNA into a membrane-bound structure called the nucleus. The nucleus houses the eukaryotic DNA, which is wrapped around proteins called histones, and controls cell activities.
Step-by-step explanation:
A distinctive feature of eukaryotic cells is the organization of tightly packaged chromosomal DNA with proteins into a membrane-bound structure called the nucleus. This is the correct answer to the question regarding the location where the DNA of a eukaryotic cell is contained. The nucleus of a eukaryotic cell is an organelle that is surrounded by a complex nuclear membrane or nuclear envelope composed of two lipid bilayers. The nucleus not only houses the DNA genome but also controls all cell activities and plays a crucial role in reproduction and heredity.
Eukaryotic chromosomes are made of DNA and proteins called histones, which organize and condense the DNA to fit inside the nucleus. Organelles such as the endoplasmic reticulum, Golgi apparatus, mitochondria, and others are also membrane-bound and provide specialized functions to the eukaryotic cells, distinguishing them from prokaryotic cells which lack a true nucleus and these complex organelles.