Centrioles are tiny cylindrical tubes found in animal cells, and their job is to help organize the structure of microtubules during cell division. Centrioles are located near the cell’s nucleus and are arranged in such a way that they form a “9+3” pattern.Know More
During the first phase of cell division in animal cells, centrioles replicate to form copies of themselves. According to Molecular Expressions, cell biology researchers are not yet sure how the duplication takes place. Before cell division starts, the centrioles live together in a pair of two groupings of microtubules. As cell division progresses, the original grouping disintegrates into two individual groupings that move to opposing poles of the cells.
The microtubules organize themselves into spindle-shaped structures that span the entire cell. The spindle-shaped fibers help in the alignment process of chromosomes as cell division progresses into the later stages. Although centrioles play a critical role in animal cell division, plant cells are capable of reproducing without them.
Centrioles in cells that have cilia or flagella are called basal bodies. However, in these cells, the centriole groupings are located closer to the cell’s surface rather than near the nucleus. In some organisms, basal bodies don’t have a permanent location, and they are functionally transformed into “normal” centrioles prior to cell division.Learn more about Cells
The smooth endoplasmic reticulum synthesizes and stores lipids in animal cells. This organelle also creates and stores steroids to be utilized as hormones throughout the body.Full Answer >
Centrioles are found in eukaryotic cells, which are found only in animal cells and a few lower plants. They are also found in male gametes of land plants, seed plants and higher plants such as ferns and club mosses. However, these cells are absent in conifers, angiosperms and most fungi.Full Answer >
Cell cycle checkpoints are times during the cell cycle in which the cell checks to see whether it is ready to proceed with mitosis or cell division. Checkpoints occur at three different times during the cell cycle: G1, G2 and M.Full Answer >
Chromatin forms chromosomes during cell division, packages DNA, reduces DNA volume, protects DNA from damage, and controls gene expression and DNA replication. Chromatin is a substance located in the nucleus of plant and animal cells consisting of RNA, DNA and other proteins.Full Answer >