Final answer:
The region inside a eukaryotic cell excluding the nucleus is called the cytoplasm, consisting of organelles in the gel-like cytosol and various other molecules, where metabolic reactions take place.
Step-by-step explanation:
The region inside the cell excluding the nucleus is known as the cytoplasm. This is the entire region between the plasma membrane and the nuclear envelope in a eukaryotic cell. The cytoplasm comprises of organelles suspended in the gel-like cytosol, the cytoskeleton, and various chemicals. Despite being made up of approximately 70 to 80 percent water, it has a semi-solid consistency due to the proteins it contains. In addition to proteins, the cytoplasm also houses glucose, polysaccharides, amino acids, nucleic acids, fatty acids, ions, and other molecules. Many essential metabolic reactions, including protein synthesis, occur within the cytoplasm.