The eukaryotic cytoskeleton
A. |
Anchors organelles |
|
B. |
Provides structure and shape to the cell |
|
C. |
Aids in cell movement |
|
D. |
All of the above |
D. All the above
So there are primarily three different types of fibers in the
cytoskeleton; microtubules, intermediate filaments and
microfilaments.
Microtubules are constructed of the monomer tubulin and are
anchored at their negative ends by the centriole (or basal body in
the case of cilia and flagella). They are the largest and thickest
of the cytoskeleton structures. They are, however, short lived
structures that change constantly in an active cell. Microtubules
function to move vesicles and organelles around in the cell (dynien
and kinesin are needed). Vesicles destined for secretion from the
cell utilize microtubules to travel to the plasma membrane.
Intermediate filaments don't serve a function in cell movement
(unlike the other two). They are primarily the backbone of the
cell. Intermediate filaments are constructed from keratin (there
are many different types of keratin). They also provide structure
for the nuclear lamina. They are called intermediate filaments
because of their size (smaller than microtubules and bigger than
microfilaments).
Microfilaments are thin and flexible fibers. They are the smallest
and are made of actin. They are involved in cell movement (as in
muscle cells; rich in actin) and phagocytosis (cellular eating).
Depending on their construction they serve different functions. For
example, if they are in a parallel formation they function in
maintaining cellular structure, if they are in bundles, they
contract the cell.
So, in short, two of the cytoskeletal fibers function in cellular
motion (microtubules and microfilaments), whereas intermediate
filaments function to maintain the integrity of the cell shape
The eukaryotic cytoskeleton A. Anchors organelles B. Provides structure and shape to the cell C. Aids...
QUESTION 5 are part of the cytoskeleton. They reinforce cell shape and anchor some cell organelles. a. Microfilaments 1 point b. Microtubules c. Intermediate Filaments QUESTION 6 Which of the following would NOT be found in a prokaryotic cell? Oa. Nucleus 1 points b. Ribosome c. Capsule Od. Cell Wall QUESTION 7 1 points Sav are found in plants. They are channels between cells that are next to each other, and allow movement of water and sap between the cells....
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
Please explain all 3 and answer questions thoroughly CHAPTER 13: CYTOSKELETON 3. The eukaryotic cytoskeleton is made of three types of filaments. Compare and contrast the three types of filaments, discussing how they are similar and different in structure and function. 4. How is the concentration of GTP linked to the cell cycle? CHAPTER 14: CELLULAR MOTILITY 5. How do dyneins and kinesins work? Describe the structures of each, what filaments they use, and how movement is achieved.
please help The organelles called mitochondria originate from A. a eukaryotic cell absorbed into a larger cell. B. part of the nucleus that broke off during mitosis. C. the endomembrane system (membrane form the ER). D. a chloroplast that lost its ability to photosynthesize. E. a prokaryotic cell in symbiosis with a larger cell. OF. None of these answers are correct
This cell structure is important for eubacterial cell shape. a. endoskeleton b. cell wall c. plasma memebrane d. ribosome e. mitochondria which cell structure is important for eubacterial cell shape?
need help for questions 21, 23, and 24 21. For a eukaryotic cell (an animal), an excess of glucose would be stored as g glucose would be stored as glycogen by a) glycogen lysis enzymes in liposomes an enzyme that binds to cellulose, c) storage in the Golgi apparatus, d) glycogen stored in the mesosomes that contaln dehydration synthesis enzymes, e) by organelles that contain dehydration synthesis enzymes 22. The molecule ATP is important because it is the energy source...
Cell Organelles and their Functions This unit we are learning about cells and the organelles contained within. In this Discussion, we’ll focus on the functions of the various organelles and cell structures: Cell membrane | Mitochondria | Plant cell wall | Plant chloroplast | Nucleus | Lysosomes | Nuclear envelope | Rough endoplasmic reticulum | Golgi apparatus | Smooth endoplasmic reticulum |Cytoskeleton | Cilia and flagella Select four of the organelles or structures above and briefly describe where each is...
Site where ribosomes are madeThe membrane surrounding the cellProvides support for the cell, has two "subparis"Name for the collection of DNA in the nucleus of eukaryotic cellsConsist of hollow tubes which provide support for the cellSmall hair-like structures used for movement or sensing thingsComposed of a phospholipid bilayerLonger whip-like structures used for movementPut a check in the appropriate column(s) to indicate whether the following organelles are found in plant cells, animal cells or both. OrganellePlant CellsAnimal CellsCell WallVesicleChloroplastChromatinCytoplasmCytoskeletonEndoplasmic reticulumGolgi apparatusOrganellePlant CellsAnimal...
Which structure(s) is/are involved with maintaining the position of organelles within a cell? A) Cell wall B) Endoplasmic reticulum C) Mitochondria D) Golgi apparatus E) Intermediate filaments
Describe the structure, composition, function and importance of the major prokaryotic and eukaryotic structures below. Structures common to all cells: Cell wall Cell membrane Cytoplasm Ribosome Nucleus/nucleoid region (genome) Flagella Structures unique to prokaryotic cells: Endospore Pilus Capsule plasmid Structures unique to eukaryotic cells: Mitochondria Chloroplast Vesicle Cytoskeleton