Lysosomes have the job of breaking down cellular macromolecules. Microtubules have the main job of helping support and shape the cell. Mitochondria are what I like to call 'power houses’; they are the power producers in an animal cell. After the mitochondria is the nucleus, which according to Regina Bailey, “Contains the cell's hereditary information and controls the cell's growth and reproduction.” Inside of the nucleus is the nucleolus that helps in the synthesis of ribosomes. The nucleopore allows nucleic acids and proteins to move about freely.
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. Also mitochondria have own DNA and its own set of ribosomes. (Clamp, 2000, pg. 92) Another important organelle is a Golgi apparatus; it is a collection of membranes and vesicles. The Golgi body is an organelle with a number of functions, including the synthesis of glycoproteins; the secretion of enzymes and hormones; and the
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.
These organelles are like the organs in a human and they help the cell stay alive. Each organelle has its own specific function to help the cell survive. The nucleus of a eukaryotic cell directs the cell's activities and stores DNA Cells have something called a cell membrane, a nucleus, and cytoplasm In this lesson we will learn the three basic parts of all cells. Cells have something called a cell membrane, a nucleus, and cytoplasm Animal Cell Structure. Animal cells are eukaryotic cells, with the presence of true nucleus; multicellular large and advanced membrane bound organelles.
b) DNA is a double helix and it replicates itself by separating the two strands while each serves as a template for new nucleotides to pair up into two new complementary strands. In prokaryotes, DNA is located all over the cell, but in eukaryotes it is only in the nucleus, and more specifically on their chromosomes. Prokaryotic DNA are located in loops, and does not contain the proteins found in eukaryotic DNA. Prokaryotes DNA has less unhelpful DNA than eukaryotes do, who have about 95% unhelpful DNA. Prokaryotes also have less complex transcriptional regulatory mechanisms than eukaryotes.
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.
In this cell though, the nucleus was not present. The plant cells and animal cells were very different. In the plant cells there was motion of cell parts but in the animal cells there was no motion. Also, the nucleus and chloroplast of the plant cell were towards the outside of the cell because the chloroplast can receive sunlight better on the outside of the cell than on the inside. In the animal cells though, the nucleus and cell organelles, were towards the middle of the cell.
Cytoplasm holds a firm structure for the inner cell; it contains protein filaments known as cytoskeleton which also assist in maintaining the shape and consistency of the cell. Apart from storing nutrient, cellular reactions take place within the cytoplasm such as protein synthesis.
Many eukaryotic cells are further divided into compartments by internal membranes in addition to the nuclear envelope, whereas prokaryotic cells never contain completely internal membranes. The prokaryotes include the mycoplasmas, bacteria, and blue-green algae. The eukaryotes comprise all plant and animal cells. In general, plant cells differ from animal cells in that they have a rigid cell wall exterior to the plasma membrane; a large vacuole, or fluid-filled pouch; and chloroplasts that convert light energy to chemical energy for the synthesis of glucose. Structure and Function Cells are composed primarily of oxygen, hydrogen, carbon, and nitrogen, the elements that make up the majority of organic compounds.
What Are The Major Components of Biological Membranes And How Do They Contribute To Membrane Function?. Summary. The role of the biological membrane has proved to be vital in countless mechanisms necessary to a cells survival. The phospholipid bilayer performs the simpler functions such as compartmentation, protection and osmoregulation. The proteins perform a wider range of functions such as extracellular interactions and metabolic processes.