Essay on cell organelles. What are cell organelles and their functions? 2022-11-06
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Cell organelles are specialized subunits within a cell that perform specific functions necessary for the cell to survive and function properly. These organelles are found in both eukaryotic and prokaryotic cells, but eukaryotic cells, which are found in plants and animals, tend to have more diverse and numerous organelles compared to prokaryotic cells, which are found in bacteria.
One of the most important cell organelles is the cell membrane, which surrounds the cell and separates the inside from the outside environment. The cell membrane is made up of phospholipid molecules, which are arranged in a double layer with their hydrophobic tails facing inward and their hydrophilic heads facing outward. This structure allows the cell membrane to be selectively permeable, meaning it can allow certain substances to pass through while preventing others from entering or leaving the cell.
Another important organelle is the nucleus, which is the cell's command center. It contains the cell's genetic material, or DNA, which carries all the instructions needed for the cell to function properly. The nucleus is surrounded by a double membrane called the nuclear envelope, which separates the genetic material from the rest of the cell. Within the nucleus are smaller organelles called nucleoli, which are involved in the production of ribosomes, which are the cell's protein-making factories.
Other organelles found in eukaryotic cells include mitochondria, which are the cell's energy powerhouses, converting glucose and oxygen into energy in the form of ATP. There are also lysosomes, which are filled with enzymes that break down and recycle waste materials within the cell. The endoplasmic reticulum and Golgi apparatus are involved in the synthesis and transport of proteins and lipids within the cell. Finally, there are the cytoskeleton and microfilaments, which give the cell shape and support and allow for movement.
In conclusion, cell organelles are vital components of cells that perform specific functions necessary for the cell to survive and function properly. These organelles are found in both eukaryotic and prokaryotic cells, with eukaryotic cells having a more diverse and numerous set of organelles. Understanding the role and function of these organelles is crucial for understanding how cells function and how they can be affected by disease and other external factors.
What are cell organelles and their functions?
The cellulose fibres have a high tensile strength and the background matrix transfer stress to the microfibrils making it very strong. Unlike the centrosomes in animal cells, plant cell centrosomes do not have centrioles. Golgi Apparatus: A stack of membranous flattened sacs and directly associated with the endoplasmic reticulum. The mitochondria produce energy ATP through oxidative phosphorylation. Some of those proteins might be used in the cell and some are sent out. Introduction Genetics: the science, which deals with the principles of heredity and variation.
Organelles are membrane-bound, specialized subunits within a cell that have a specific function. The nucleus is a large membrane bound organelle. These organisms were able to reproduce in a very limited environment because they are so simple. Another reason is so that chromosomes are equally distributed among two daughter cells which helps in maintaining the similar amount of genetic material in all the body cells. The brain is an organ made up of different tissues.
The Structure of Rough ER and the nucleus Petruzzello. Rough ER transports materials through the cell and produces proteins in sacks called cisternae which are sent to the Golgi body, or inserted into the cell membrane. Mitochondria contain a small circular DNA molecule, mitochondrial RNA, and ribosomes for the synthesis of some of its proteins Mclennan et al. Nucleus is absent and not surrounded by membrane The nucleus is enclosed by two concentric unit membrane 2. The mitochondrion converts the energy stored in glucose into ATP adenosine triphosphate for the cell.
Eukaryote Eu meaning true these cells such as plant, animal and fungi all contain the DNA information stored within a nucleus and subsequently contain the ability to divide and replicate. The cristae greatly increase the inner membrane's surface area. Humans have an estimated 100 trillion cells; a typical cell size is 10 micrometers, a typical cell mass is 1 nanogram. Organelles that perform photosynthesis in photosynthetic cells of plants and algae are called chloroplasts. Mitochondria: Mitochondria provide the energy a cell needs to move, divide, produce secretory products, contract - in short, they are the power centers of the cell. The vacuole is filled with cell sap, a concentrated solution which acts as a storage site fro chemicals, mineral salts, dissolved gasses, wastes and pigments.
The food that we eat is broken into simpler molecules like carbohydrates, fats and etc in our bodies. For this to happen eight separate histone protein subunits attach to the DNA molecule to Immunofluorescence Lab 496 Words 2 Pages The structure of the cell was very visible when using the anti-tubulin. In animals there are four main groups of tissues: Epithelia - covers body surface and forms the lining of internal cavities. The middle lamella connects adjacent cell walls. Although the origin of the organelle is unclear, it is believed that it is derived from a symbiosis relationship between a bacterium and an archaea Martin W. Microtubulars make up the spindle that separates chromosomes during mitosis cell division. Notably, prior to the proposal of the cell theory, limited knowledge and understanding of what humans comprised of was evident and thus the theory of spontaneous generation was brought forth.
Centrioles present only in cells of lower plant forms. It is responsible for directing the cell in its functions and it also stores the DNA. Lysosomes and peroxisomes are membrane bound organelles which contain enzymes that remove unwanted particles. It also contains enzymes for detoxification. Catalase hydrolyzes toxic hydrogen peroxide to generate water and oxygen. Types of variation: 1.
Some cells are complete organisms, such as the unicellular bacteria and protozoa; others, such as nerve, liver, and muscle cells, are specialized components of multi-cellular organisms. Centrosome: The centrosome, or MICROTUBULE ORGANIZING CENTER MTOC , is an area in the cell where microtubules are produced. The misfolded CFTR protein fails to leave the ER and is degraded by autophagic mechanisms Fitzpatrick and Jonathan 54. Organelles within Animal Cell The Nucleus: The nucleus controls the cell's activities and is the most noticeable organelle in a eukaryotic cell. It produces the membranes that surround the lysosomes.
Plants need food to live, just like animals do. Plant cell: A structural and physiological unit of plant, which have protoplasm. Its functions are to: digest material from the environment. This is where DNA is contained. For example, making food for the Kingdom exemplifies the ribosomes of the cell creating proteins and the protecting of John imitates the functions of the cell membrane.