what are microtubules
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Structures and Functions of Microtubules Microtubules are filamentous intracellular structures that are responsible for various kinds of movements in all eukaryotic cells. Microtubules are involved in nucleic and cell division, organization of intracellular structure, and intracellular transport, as well as ciliary and flagellar motility.icrotubules form a framework for structures such as the spindle apparatus that appears during cell division, or the whiplike organelles known as cilia and flagella. Cilia and flagella are the most well-studied models for microtubule structure and assembly, and are often used by textbooks to introduce microtubules.
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Centrioles - Organizing Chromosomes A centriole is a small set of microtubules arranged in a specific way. There are nine groups of microtubules. When two centrioles are found next to each other, they are usually at right angles. The centrioles are found in pairs and move towards the poles (opposite ends) of the nucleus when it is time for cell division.here are nine groups of microtubules. When two centrioles are found next to each other, they are usually at right angles. The centrioles are found in pairs and move towards the poles (opposite ends) of the nucleus when it is time for cell division.
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- spindle fibers A collection of microtubules attached to a centromere during mitosis and meiosis that are responsible for the movement of the chromosomes to opposite poles. Spindle fibers align the chromosomes along the middle of the cell nucleus. The protein fibers formed during prophase of nuclear division; chromosomes attach to these fibers at the centromere. spindle The aggregation of microtubules that is involved in the movement and separation of chromosomes during mitosis and meiosis.
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- mi·cro·fil·a·ment. noun. Any of the actin-containing filaments that are found in the cytoplasm of eukaryotic cells and are involved in generating cell movement, providing structural support, and organizing internal cell components. Microfilaments, along with intermediate filaments and microtubules, make up a cell's cytoskeleton.
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Microtubules, the intra-cellular transport system, health and longevity From the 2007 document Microtubules: an overview: “Microtubules are found in all eukaryotes and are built from alphabeta-tubulin heterodimers. The alpha-tubulins and beta-tubulins are among the most highly conserved eukaryotic proteins.
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Microtubules, the intra-cellular transport system, health and longevity In special cases, such as the microtubules that support the long axons and dendrites of nerve cells, auxiliary proteins stabilize the microtubule for longer periods of time. But the dynamic structure of microtubules is essential for their essential for their everyday function in transport and cell division.”.
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Role of Centrioles in Microbiology Centrioles are cylindrical structures that are composed of groupings of microtubules. Centrioles are found in animal cells and play a role in cell division. Centrioles are cylindrical structures that are composed of groupings of microtubules. Centrioles are found in animal cells and play a role in cell division.
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Section 19.5 Microtubule Dynamics and Motor Proteins during Mitosis Section 19.5Microtubule Dynamics and Motor Proteins during Mitosis. Mitosis is the process that partitions newly replicated chromosomes equally into separate parts of a cell. The last step in the cell cycle, mitosis takes about 1 hour in an actively dividing animal cell. During that period, the cell builds and then disassembles a specialized microtubule structure, the mitotic apparatus.
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- Main Functions of Microtubules: 1  Microtubules are the main building blocks that form the cytoskeleton-which is the cell's framework within which all components of the cell are held in position or allowed to move within certain constraints.2  Movement of materials and structures within cells.ain Functions of Microtubules: 1  Microtubules are the main building blocks that form the cytoskeleton-which is the cell's framework within which all components of the cell are held in position or allowed to move within certain constraints.
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This page centres. Microtubules are basic structures of spindle apparatus, centrioles, basal bodies, cilia and flagella and are responsible for cell motility and maintenance of shape. Their tips can grow and shorten quickly. GTP, Ca2+, Mg2+ and a calmodulin bound protein are required for assembly. Colchicine prevents it.
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- The centrosome is a place inside the cell where microtubles are formed. inside the cell centrosome there are centrioles wich are made up of a ring of nine microtubules. these … centrioles are only found inside animal cells. centrosome is where microtubules are organised in a cell and can  be thought of as the centre of a spiders web with all the threads  coming out from it. It provide support … for the microtubules and is  responsible for their breakdown and construction.
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Cytoskeleton The cytoskeleton is responsible for cell shape, motility (movement) of the cell as a whole, and motility of organelles within a cell. There are three types of filaments in the cytoplasm of most vertebrate cells: microfilaments, microtubules, and intermediate filaments.All of these filament systems share a critical feature: They are composed of proteins that have the unique property of being able to self-assemble into a filamentous network.here are three types of filaments in the cytoplasm of most vertebrate cells: microfilaments, microtubules, and intermediate filaments. All of these filament systems share a critical feature: They are composed of proteins that have the unique property of being able to self-assemble into a filamentous network.
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Chapter 8, Cellular Reproduction During mitosis the mitotic spindle, a football-shaped structure of microtubules, guides the separation of two sets of daughter chromosomes. Spindle microtubules grow from two centrosomes, clouds of cytoplasmic material that in animal cells contain centrioles.
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- Microtubule play important roles in cell division, intracellular transport, cell movement and in the maintenance of cell structure. Microtubules(MTs) are polymers of dimeric alpha and beta tubulins. They are one of the cytoskeletal elements. They provide rigidity to the cell thereby maintaining its shape.
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What Function Do Spindles Perform During Mitosis? The spindle microtubules are protein fibers made up of as many as 45 different proteins that grow from the centrioles. They form a polymer, which is a large molecule made up of many similar molecules linked together.
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Microtubules: Definition, Functions & Structure Microtubule Structure. Microtubules are the largest cytoskeletal filaments in cells, with a diameter of 25 nanometers. They are made out of subunits called tubulin. Each tubulin subunit is made of one alpha and one beta tubulin that are attached to each other, so technically tubulin is a heterodimer, not a monomer.icrotubule Structure. Microtubules are the largest cytoskeletal filaments in cells, with a diameter of 25 nanometers. They are made out of subunits called tubulin. Each tubulin subunit is made of one alpha and one beta tubulin that are attached to each other, so technically tubulin is a heterodimer, not a monomer.
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Microtubules and Filaments In many types of cells, networks of actin filaments are found beneath the cell cortex, which is the meshwork of membrane-associated proteins that supports and strengthens the plasma membrane. Such networks allow cells to hold — and move — specialized shapes, such as the brush border of microvilli.icrotubules are the largest type of filament, with a diameter of about 25 nanometers (nm), and they are composed of a protein called tubulin. Actin filaments are the smallest type, with a diameter of only about 6 nm, and they are made of a protein called actin.
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Role of Centrioles in Microbiology Centrioles are cylindrical structures that are composed of groupings of microtubules arranged in a ring of nine triplets. They are found in animal cells and help to organize the assembly of microtubules during cell division. Credit: Stocktrek Images/Getty Images.
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- The mitotic spindle is a structure composed of microtubules which segregates chromosomes into the daughter cells during mitosis. A microtubule is a rope-like component of the cytoskeleton.The centrosome is an organelle that serves as a microtubule organizing center during cell division.n astral microtubule is a short microtubule which emanates from the centrosome and serves to accurately position the mitotic spindle within the cell. A kinetochore microtubule is a microtubule which attaches to the kinetochore and positions the chromosomes during mitosis.
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- Cytoskeleton, confocal light micrograph. Tubulin, the protein that makes up microtubules, is blue. Microtubules are part of the cytoskeleton, which maintains the cell's shape, allows some cellular mobility and is involved in intracellular transport.icrotubules are composed of the protein tubulin. Examples: Microtubules play a huge role in movement within a cell. They form the spindle fibers that manipulate and separate chromosomes during the mitosis phase of the cell cycle.
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Centrioles - Organizing Chromosomes ofmicrotubules. They are long, thin, and stringy proteins (mainly actin) compared to the rounder, tube-shaped microtubules. We'd like to say you can find them here or there, but they are everywhere in a cell. They work with microtubules to form the structure that allows a cell to hold its shape, move itself, and move its organelles.
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- The mitotic spindle is the macromolecular machine that segregates chromosomes to two daughter cells during mitosis. The major structural elements of the spindle are microtubule polymers, whose intrinsic polarity and dynamic properties are critical for bipolar spindle organization and function.he mitotic spindle is the macromolecular machine that segregates chromosomes to two daughter cells during mitosis. The major structural elements of the spindle are microtubule polymers, whose intrinsic polarity and dynamic properties are critical for bipolar spindle organization and function.
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- This theory proposes that microtubules are responsible for consiousness. Microtubules are made up of tubulin protein dimers. These microtubules contain hydrophobic pockets and these may contain pi electrons. They have found that due to high doses of anesthesia, microtubules present in neurons defibrilllate.
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Microtubule Microtubules are nucleated and organized by microtubule organizing centers (MTOCs), such as the centrosome found in the center of many animal cells or the basal bodies found in cilia and flagella, or the spindle pole bodies found in fungi.
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What Function Do Spindles Perform During Mitosis? Components. The spindle microtubules are protein fibers made up of as many as 45 different proteins that grow from the centrioles. They form a polymer, which is a large molecule made up of many similar molecules linked together.