Get Section 10 2 Cell Division Pages 244 249

At the molecular level, however, interphase is the time during which both cell growth and DNA replication occur in an orderly manner in preparation for cell division. The cell grows at a steady rate throughout interphase, with most dividing cells doubling in size between one mitosis and the next.

As the cell increases in size the volume of the cell increases more rapidly than the surface area which causes a decrease in the cell's ratio of surface area to volume and makes it more difficult for the cell to move needed materials in and waste products out.

The longest stage of the cell cycle is called interphase. Interphase is the stage that occurs in between cell divisions. During interphase, the cell grows and develops and performs its functions.

Limits to Cell Size There are two main reasons why cells divide: Information "overload : The larger a cell gets, the more demands it places on its DNA. Eventually, the cell's DNA cannot meet the cell's needs. Exchange of materials: Cells take in nutrients and eliminate wastes through the cell membrane.

In the adult organism, mitosis plays a role in cell replacement, wound healing and tumour formation. Mitosis, although a continuous process, is conventionally divided into five stages: prophase, prometaphase, metaphase, anaphase and telophase.

In eukaryotic cells, or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase.

What limits cell sizes and growth rates? Cell growth is limited by rates of protein synthesis, by the folding rates of its slowest proteins, and for large cells by the rates of its protein diffusion.

Cell division solves the problem of increasing size by reducing the volume of cytoplasm in the two daughter cells and dividing up the duplicated DNA and organelles, thereby increasing surface to volume ratio of the cells. ... Notice the size of the cell starting to get bigger during interphase.

Interphase is composed of G1 phase (cell growth), followed by S phase (DNA synthesis), followed by G2 phase (cell growth). At the end of interphase comes the mitotic phase, which is made up of mitosis and cytokinesis and leads to the formation of two daughter cells.