Nucleus- “the brain” or control center of the cell. The Nucleus, a membrane-bound structure of a cell, plays two crucial roles in controlling the cell. The nucleus carries the cell's genetic information that determines if the organism will develop, for instance, into a tree or a human; and it directs most cell activities including growth, metabolism, and reproduction by controlling protein synthesis. The presence of a nucleus distinguishes the more complex eukaryotic cells of plants and animals from the simpler prokaryotic cells of bacteria and cyanobacteria that lack a nucleus. The nucleus is the most predominate structure in the cell.
They are found free in the cytoplasm and attached to ER (making it rough ER). (Clamp, 2000, pg. 128) Mitochondrion is known as the powerhouse of the cell it is a rod-shaped organelle and its main job is to release energy from carbohydrates into ATP. Mitochondrion is responsible for cell respiration. It has an interesting feature, the mitochondria has a double membrane where the internal membrane is folded up and this where the cell respiration takes place.
The nucleus being one of the most important parts of a cell is found in the middle of the cell containing DNA; the DNA is like the control room of each cell, giving orders to the cell; telling the cell to grow, die etc. The nucleus is then covered by a nucleus envelope; this envelope gives protection to the DNA which is inside the nucleus, the nucleus envelope also disconnects the nucleus from the rest of the cell. The nucleus in the animal cell also controls the animal’s cell growth, reproduction and metabolism. Vacuole Vacuoles are sac-like substances found in cells, they are found in both plant and animal cells but mainly in plant cells. These sacs are food storages for the cell, not only do they store food but at times hold in the waste produc... ... middle of paper ... ... uterus once given birth.
The transcription phase of protein synthesis takes places in the cell nucleus. After this step is complete, the mRNA leaves the nucleus and travels to the cell's ribosomes, where translation occurs. Another important cellular organelle is the mitochondrion. Mitochondria (many mitochondrion) are often referred to as the power plants of the cell because many of the reactions that produce energy take place in mitochondria. Also important in the life of a cell are the Lysosome.
Lipids are another form of fat molecules that are components of a cell membrane. Proteins are organic molecules that are important in all living things. Proteins that are called enzymes make cellular molecules into other forms that can help a cell take out waste, help build support structures, or help the cell meet the energy that it needs. Carbohydrates are another important organic molecule that is the sugars and starches in a cell. Nucleic acids are molecules that assist to express a cell's genetic code.
This secondary wall is made of lignin and cellulose, woven together tightly, to prevent further growth and to form and strong protective barrier. Cytoplasm Size: Unmeasurable Basic Function: * Helps dissolve waste products * Creates a "medium" for vesicles to travel through * Aids in cell metabolism * Serves as a home for the cytoskeleton. The cytoplasm is the jelly-like material that makes up much of the cell. It is 80% water and usually clear in color. It also contains many salts.
Its main function is to dispose of waste and digest materials. Their size ranges from 0.1 micrometers to 1.2 micrometers and has an outer membrane that allows materials to enter but stops the enzymes from escaping. Whenever a piece of the cell gets damaged it’s sent to the lysosome where it is broken down. Once it’s broken down it is sent out and expelled through the cell membrane. Endoplasmic reticulum: The endoplasmic reticulum is an organelle made of tube-like structures known as cisternae.
Animal cells are eukaryotic cells, with the presence of true nucleus; multicellular large and advanced membrane bound organelles. Like plant cells, animal cells have same organelles except the cell wall, chloroplasts, number of vacuoles and many more. You, my friend, are made up of cells. Lots and lots of them. Some of them are eukaryotic human, but many more of them are prokaryotic, thanks to the friendly bacteria of your gut, skin, and other body systems.
These small capsule shaped cytoplasmic organelles are found in all eukaryotic animal and plant cells. Figure 1 shows the double membrane; the outer membrane is smooth and covers the organelle like a skin. The inner membrane folds over many times and creates layered structures called cristae; this structure creates more space to allow the production of energy faster.
They interact with moto... ... middle of paper ... ...it serves the same purposes in both cells: it’s the command center of the cell, it contains the genetic information of the cell and instructions for copying itself, as well as for what the cell should do. The ribosomes, needed for protein synthesis along with the nucleus, form in the nucleolus, located in the nucleus. Because it controls all functions of the cell, and makes it possible to pass on its genetic information, it is essential to the plant cell. Even though organisms seem simple on the surface, when one looks closer, they can see how complex it really is. Many different processes take place within an organelle of a small cell, and each have their own importance.