Table of Contents
- 1 What helps organize cell division in animal cells?
- 2 What role does the spindle play in dividing the cell?
- 3 What is in animal cells comes in pairs and helps the cell to reproduce by pulling apart chromosomes?
- 4 What is the role of the Centriole in cell division?
- 5 How is the spindle formed?
- 6 Which structure can be seen only when the cell divides?
What helps organize cell division in animal cells?
Centrioles – Centrioles are self-replicating organelles made up of nine bundles of microtubules and are found only in animal cells. They appear to help in organizing cell division, but aren’t essential to the process.
What role does the spindle play in dividing the cell?
In cell biology, the spindle apparatus (or mitotic spindle) refers to the cytoskeletal structure of eukaryotic cells that forms during cell division to separate sister chromatids between daughter cells.
What are used during cellular division to arrange the mitotic spindle that pull apart chromosomes?
During anaphase (b), the sister chromatids are pulled apart and move toward opposite poles of the cell. Following prometaphase, metaphase begins. At the start of metaphase, the microtubules arrange the chromosomes in a line along the equator of the cell, known as the metaphase plate (Figure 3b).
What is in animal cells comes in pairs and helps the cell to reproduce by pulling apart chromosomes?
The two centrosomes will give rise to the mitotic spindle, the apparatus that orchestrates the movement of chromosomes during mitosis. At the center of each animal cell, the centrosomes of animal cells are associated with a pair of rod-like objects, the centrioles, which are at right angles to each other.
What is the role of the Centriole in cell division?
Centrioles play a notable role in cell division. These spindle fibers act as guides for the alignment of the chromosomes as they separate later during the process of cell division. Though centrioles play a role in the mitosis of animal cells, plant cells are able to reproduce without them.
What is the function of spindle?
Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis.
How is the spindle formed?
At the beginning of nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of the cell forming cell poles. Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle.
Which structure can be seen only when the cell divides?
The cell component visible only during cell division is the chromosome. In a nondividing cell, the genetic material that is known as DNA is present as chromatin fibers. Chromosomes are visible only during certain stages of cellular division.