Cell Cycle part 2

Now the cell should have double the amount DNA after interphase. The next phase is m-phase. The m-phase consists of mitosis (separation of 1 cell nucleus to 2 nuclei) and cytokinesis (cytoplasmic division or whole cell division). There are 4 steps in mitosis. To help understand this concept, I will explain the structure of a chromosome. A chromosome is formed during mitosis to help in nuclear division. A chromosome has two sides, each side is a copy of the other(interphase), therefore, each side separates into its own nucleus so the new cell has an exact copy of the parent cell's DNA.
The first phase is called prophase. During prophase, the chromosomes become visible from chromatin and the nucleolus disappears. The next phase is called metaphase. Here, the chromosomes line up in the center and fibers called spindle fiber attach to the chromosomes centromere from both sides. The next step, anaphase, the spindle fibers pull on the chromosomes where each copy is separated to either side. Finally, telophase, a phase where the nucleus forms and the chromosomes dissipate into chromatin.
Right after telophase, cytokinesis occurs. Now the whole cell will be divided and each would have it own nucleus. This new cell wouldn't start to go through interphase, rather, it would go into a G0 phase, where this whole process is stopped until the body directs the cell to replicate again.

Comments

  1. Alan8 March 2019 at 04:34

    Consulta IPVA 2020, consulte agora e agende sua vistoria.

    ReplyDelete
  2. RAMU BADIRENI19 July 2019 at 19:59

    ?well.
    is the chromatin material is the freely scattered chromosomes in the nucleus?
    in that way to facilitate gene transcription for cellular processes.

    ReplyDelete

Post a Comment

Popular posts from this blog

Vegetable Battery

Image
The energy for the battery comes from the chemical change in the zinc (or other metal) when it dissolves into the acid. The energy does not come from the lemon or potato. The zinc is oxidized inside the lemon, exchanging some of its electrons with the acid in order to reach a lower energy state, and the energy released provides the power. In current practice, zinc is produced by electrowinning of zinc sulfate reduction of zinc with carbon, which requires an energy input. The energy produced in the lemon battery comes from reversing this reaction, recovering some of the energy input during the zinc production.
Read more

How does graphite conduct electricity ?

Image
Graphite can conduct electricity due to the vast electron delocalization ( delocalized electrons are electrons in a molecule, ion or solid metal that are not associated with a single atom or one covalent bond)  within the carbon layers (a phenomenon called aromaticity ). These valence electrons are free to move, so are able to conduct electricity. However, the electricity is primarily conducted within the plane of the layers. The conductive properties of powdered graphite allowed its use as a semiconductor substitute in early carbon microphones.
Read more