Table of Contents
- 1 What structures make up the mitotic spindle?
- 2 What does the spindle form between?
- 3 Which of these structures are mostly involved in the formation of spindle apparatus in a cell?
- 4 Where do the microtubules of the spindle originated during mitosis in both plant and animal cell?
- 5 What structures serve as spindle fiber organizing centers?
- 6 Where do spindle fibers originate during mitosis of animal cells?
What structures make up the mitotic spindle?
Spindle fibers are made up of microtubules and they appear as spindle-shaped structures (thus, the name). They develop outside the nucleus during mitosis. The major components of the mitotic spindle include the spindle fibers (microtubules), microtubule-associated proteins, and the microtubule organizing center.
Where does spindle formation occur?
centrosome
The centrosome determines the shape of the cell as well as the mitotic spindle apparatus. In eukaryotic cells, polymerization of microtubules from alpha and beta tubulin is initiated at the centrosome to form the mitotic spindle and the structure for cytokinesis.
What does the spindle form between?
Microtubules that will eventually form the mitotic spindle extend between the centrosomes, pushing them farther apart as the microtubule fibers lengthen. The sister chromatids begin to coil more tightly with the aid of condensin proteins and become visible under a light microscope.
Which structure Organises spindle formation during mitosis in animal cells?
Centrioles
Centrioles are found as single structures in cilia and flagella in animal cells and some lower plant cells. Centrioles are constructed of microtubules. In animal cells centrioles organise the pericentriolar material to produce microtubules including mitotic spindle fibres.
Which of these structures are mostly involved in the formation of spindle apparatus in a cell?
Microtubules
1 Introduction. Microtubules are filamentous polymers that constitute an essential part of the cytoskeleton in all eukaryotes. Most prominently, microtubules are visible during cell division, as the main structural elements of the spindle apparatus.
Where do spindle fibers originate in plant cells?
Microtubules that form the spindle fibers come from centrosomes, which are organelles located in opposite poles near the nucleus.
Where do the microtubules of the spindle originated during mitosis in both plant and animal cell?
centrioles
The microtubules of the spindle originate from the centrioles of the cell.
Where does the spindle Fibres originate from in plant cell?
Plant cells lack centrioles but still, they are capable to form a mitotic spindle from the centrosome area of the cell located just exterior to the nuclear envelope.
What structures serve as spindle fiber organizing centers?
Definition. Spindle fibers are microscopic protein structures that help divide genetic material during cell division and organize cellular components. The spindle fibers form out of the centrosome, also known as the microtubule-organizing center, or MTOC.
Where do the microtubules of the spindle originate during mitosis in animal cells quizlet?
They are sites at which microtubules attach to chromosomes. They are located at the center of the centrosome; their function is to organize tubulin into elongated bundles called spindle fibers.
Where do spindle fibers originate during mitosis of animal cells?
Spindle fibers are microscopic protein structures that help divide genetic material during cell division and organize cellular components. The spindle fibers form out of the centrosome, also known as the microtubule-organizing center, or MTOC.
What structure produces spindle fibers in plant cells?
The spindle apparatus of a cell is comprised of spindle fibers, motor proteins, chromosomes, and, in some animal cells, microtubule arrays called asters. Spindle fibers are produced in the centrosome from cylindrical microtubules called centrioles.