The Cell Cycle

The electric cell pedal is a sequence of events in the life of a cell, including cell division. booth division distributes identical sets of chromosomes to daughter cells. This process is used for reproduction, fuck offth, and repair in the body. The cell cycle can be broken deplete into two parts interstage and the mitotic (M) phase. Interphase, a growth period, alternates with mitosis and accounts for 90 percent of the cell cycle. During interphase, the cell grows, duplicates its DNA, and prepares for mitosis. This phase can be broken down into 3 mill phases G1, S, and G2.During the G1 or first gap phase, the cell grows and per excogitates normal metabolic roles, including producing proteins and organelles. During the S phase, which stands for synthesis of DNA, the cells chromosomes are copied. Lastly, in the G2 phase, the cell continues to grow and prepares for cell division. This phase of the cell cycle is regulated by check over and go signals called checkpoints, which ar e located between G1 and S, G2 and M, and M and G1. These make positive(predicate) that the cell cycle can proceed and is being performed correctly.The hallmark of this phase is that the DNA egresss as loosely packed chromatin and the centrioles are together. Centrioles dramatic play an important role in animal cell division. They are compose of microtubules which become mandrel fibers that guide the movement of chromosomes in mitosis. Mitosis is the division of the nucleus, which accounts for single 10 percent of the cell cycle. Mitosis can be broken down into five sub phases prophase, prometaphase, metaphase, anaphase, and telophase cytokinesis takes place last. In prophase, the chromatin condenses to chromosomes and the two babe chromatid are joined at the centromere.As the centrioles begin to separate, the mitotic spindle, made of microtubules, begins to form and the nucleolus disappears. In prometaphase, the atomic membrane dissolves, which brooks the spindle to act w ith the chromosomes, although the spindle isnt fully formed yet. The sister chromatids of the chromosomes develop proteins within the centromeres called kinetochores. These allow the chromosomes to attach to the microtubules of the spindle, which are called kinetochore microtubules. Nonkinetochore microtubules arent connected to chromosomes, but they interact with other microtubules rom the other pole of the cell. By metaphase, the centrioles are at the opposite poles of the cell and the spindle is fully formed. The chromosomes, attached to the spindle, move to the ticker of the cell and line up at the imaginary metaphase plate. Anaphase begins when the centromeres of the chromosomes split and the chromatid is without delay a chromosome. The chromosomes begin to move toward the opposite poles of the cell and the poles move further apart. In telophase, two daughter nuclei form at the poles of the cell, the nucleolus and nuclear membrane reappears, and the chromosomes unravel.Cytoki nesis, the splitting of the cytoplasm, occurs simultaneously as telophase. Two daughter cells appear by the creation of a cleavage furrow, which pinches the cell in two. after(prenominal) mitosis, the cell can grow and mature to divide once again kindred epithelial, blood, and stem cells, or grow and mature to never divide again like brain, nerve, and muscle cells. These cells go to the G0 phase, a non-dividing resting period. Liver cells can be called back from the G0 phase to divide again, which makes the liver the only organ to regenerate. This demonstrates the impressiveness of the cell cycle.