Final answer:
The statement that nuclein was separated from the cytoplasm of white blood cells is true, as nuclein, known today as RNA and DNA, was isolated from the nuclei of cells. The nucleus is distinct from the cytoplasm and is crucial for housing genetic material and cell division in eukaryotic cells.
Step-by-step explanation:
The statement nuclein was separated from the cytoplasm of white blood cells is true. Nuclein, which would eventually be known as RNA and DNA, was isolated from the nuclei of cells and not from the cytoplasm. In eukaryotic cells, the nucleus houses the cell's genetic material, DNA, and is separated from the cytoplasm by the nuclear envelope. The nucleus is a defining feature of eukaryotic cells, and during a process known as mitosis or meiosis, it plays a crucial role in cell division.
Mature red blood cells, or erythrocytes, are an exception to this because they extrude their nucleus during maturation to create more space for hemoglobin. In other cells, the DNA remains within the nucleus, and various types of RNA are transcribed from it and later transported to the cytoplasm where they play a role in protein synthesis.