Cell division
From District87 Wiki
Contents |
Growing
In the first part of a cell's life, it will grow to a full size, and then it will produce the structure needed. The cell will then make copies of the Mitochondria and the Chloroplasts. Your cells will also make or produce the enzymes and ribosomes in the growing stage.
Copying DNA
In the next step, your nucleus creates DNA in an exact copy as the other cells. This process is called replication. All the information that your cell needs to function is found inside of the DNA. In a daughter cell, it is very important to have a complete set of DNA. At the end of the replication process you will have two identical sets of DNA.
Preparing for Division
The cell will prepare for division once the DNA has replicated. A structure that will divide the cell into two new cells is created by the cell. The cell will be ready to separate or divide at the end of interphase.
Mitosis
The cell cycle begins after your first stage which is known as interphase. You will get two nuclei from your one nucleus and it changes in the stage called Mitosis. Your daughter cells will receive one part of each DNA in the mitosis process. If there is one wrong DNA you can have a serious disease such as cancer.
Divided by scientists, mitosis has four parts. The four parts are known as prophase, metaphase, anaphase, and telophase. When your cell is in prophase, your nucleus's three like chromatin will then condense and form double-rod structures known as chromosomes. Each and every chromosome has two rod-like bars because the two bars represent DNA and were replicated. Later, as the cell goes through the processes of metaphase, and next anaphase, and then lastly telophase the chromatids break apart and separate from each other and then move to the opposite ends of the cell. After that the two new nuclei appear around the brand new on the opposite ends of the cell.
Cytokinesis
Cytokinesis is your final stage of cell division, which will complete your whole process. The organelles will be distributed and turned into 2 new cells. That is after your cytoplasm has divided. This step will usually start around the same time that telophase will start. After Cytokinesis has been completed two new cells have been created. These cells are knows as daughter cells. Each and every daughter cell will have the same amount of chromosomes that their parent cells have. Once you reach the end of this process, your whole cycle will start over.
Cytokinesis in Animal cells
When an animal cell goes through cytokinesis the cell membrane will tighten around the middle of a single cell. Your cytoplasm will pinch into two cells. So your daughter cell will then get about half of the organelles.
Cytokinesis in plant cells There is a slight difference in cytokinesis inside of a plant cell. As a result of the plant cell's cell wall that is very rigid, they can not tighten together like a cell membrane can. To make up for that a form called the cell plate will form across the middle of your cell.Your cell plate will then form two different cell membranes. These will be between your two daughter cells. In your next step cell walls will form around the cell membrane.
Structure and Replication of DNA
Genetic information that your cell needs to carry out it's proper activities are ensure in your daughter cell by, your DNA replication. The structure has to be knows before you can know how your DNA replicated. Rosalind Franklin photographed DNA, by using an x-ray method.
The Structure of DNA
The DNA ladder looks like a twisted starcase. there are four kinds of nitrogen, they are listed in the picture below.
The Replication Process
DNA replication starts when the two sides of the DNA molecule becomes undone and seperate. After that, nitrogen bases that are floating in the nucleus get together with the bases on each other half of the DNA molecule. Because of the way which the nitrogen bases pair up with another, the order of the bases in each new DNA molecule accurately matches the o rder of the orginal DNA molecule.
