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Cell & Role Of Its Structure | Assignment

   

Added on  2019-09-30

4 Pages1362 Words236 Views
Blog WritingTopic: Structure of a cell and its functions?Keyword: Structure of a cellIntroductionCell is the lifeline of an organism from which it grows and gets its nourishment. The structure of the cell plays a vital role in proper functioning of the body. It can be divided into three important parts, cytoplasm, nucleus and cell membrane. Cell is the smallest form of life and has the numerous fibres which help in performing the vital functions. The structure of the cell is also important for the structure and functions of the living organism.Some of the important components of the structure of the cell are as follows:Cell Wall- This structure is outside of the cell membrane, and forms the surrounding. The structure of cell is different from that in plants and animals in terms of the cell wall. In plants, the cell wall is made up of the cellulose, and generally have three different layers which can support plants life. These include, primary cell wall, middlelamella, and the secondary cell wall. Cell membrane- This is another important component of the structure of the cell and is also known as plasma membrane. This membrane is also responsible to separate theexternal environment and the internal cellular structures. It has the function to protect the cytoplasm. It has double layer of fats which is called, phospholipids. Mitochondria- It is an important component of the structure of the cell. It performs the function to convert oxygen and glucose into energy. The chemical substance helpsin transporting energy which can be used by cellular structure to grow and repair. The chemical ATP is vital for cellular respiration. When the amount of energy required bythe cell increases, mitochondria number increases. It is also known as the powerhouseof the structure of the cell.Nucleus- Nucleus forms one of the important structure of the overall structure of the cell. It contains the genetic component which are arranged in DNA molecules, and arranged in the form of chromosomes. The evidence indicate that each of the cell havearound two meters of DNA. This component of the structure of the cell is responsible for genetic characteristics of organisms. The genes in the chromosomes helps in the promotion of the functions of the cell. It control various activities and lead to the

integrity of the genes. It regulates the expression of the gene and therefore most microbiologists name it as the control centre of the cell. The nucleus matrix, is the network of nucleus which provides the mechanical support to the structure of the cell. The larger molecules cannot pass through the nuclear membrane, the nuclear pores helps in transportation of the molecules all over the cell envelop. The larger molecules which include RNA and proteins, are used for gene expression and regulation of the chromosomes. It is one of the largest organelle in the structure of the cell of the animals. The nuclear envelope or the nuclear membrane, are made of the two membranes, outer and the inner membrane. It encloses the nucleus, and helps in the generation of the genetic material of the cell. The nuclear pores of the structureof the cell provides the aqueous medium through the proteins are distribute throughout the cell. Endoplasmic reticulum- It is also one of the important parts of the structure of the cell. It helps in various general functions, which include, creating the molecules of protein in sacs, and supports the transportation of the proteins in Golgi bodies. This organelle of the structure of the cell, is mainly involved in wrapping of the proteins and acts as the brain of the cell. It operates closely with the Golgi bodies and ribosomes. It helps in the synthesis of the proteins, and other membrane lipids. The quantity of this organelle, in the structure of the cell changes over time, which is highly dependent on the changes in the metabolic activities of the cell. The changes inthe content of the protein can take place without any changes in the structure of the cell. The surface of these organelle, is made of the protein loaded ribosomes, which is also the reason for the rough appearance of the cell. These ribosomes are not the stable component of the cell, as they are constantly changed and released from the structure of the cell. Iysosome- RibosomeGlogi AppaatusDNA

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