The nuclear envelope controls the flow of information into and out of the nucleus. It is a porous double membrane that allows the free passage of water, ATP and other small molecules. It regulates the passage of macromol... More » Science Biology Cells

The nuclear envelope surrounds and protects a eukaryotic cell's DNA and its surrounding nucleoplasm. The membrane is comprised of two layers with a narrow space between them. The surface of the envelope is covered with t... More »

In the asexual cellular reproduction process called mitosis, the cell's nuclear envelope disintegrates during the prometaphase stage. Because the events of prometaphase begin in the final stages of the preceding phase, w... More »

The nuclear membrane, also called the nuclear envelope, surrounds the nucleus in a double layer with multiple pores that regulate the flow of protein and RNA. The pores also allow water, ATP and smaller molecules to flow... More »

The function of the nuclear membrane in an animal cell is to hold the DNA inside the nucleus in order to protect it from surrounding substances. The nuclear membrane also regulates which substances can enter or exit the ... More »

The nucleolus contains all of the information needed for DNA replication, flow of proteins and RNA, all while controlling the synthesis of protein and cell replication. The nucleolus has several parts: the nuclear envelo... More » Science Biology Cells

The nucleus of a cell contains genetic material called chromosomes; the nuclear membrane, called the nuclear envelope, which controls the cell's growth and reproduction; and a liquid called nucleoplasm. The nucleus manag... More »