Which one of the organelle's is responsible for the formation of aster in cell division ?
Which one of the organelle's is responsible for the formation of aster in cell division ?
The correct option is A Centrosome
An aster is a star-shaped cellular structure formed around each centrosome during mitosis or meiosis in an animal cell. They are considered part of the cytoskeleton. Astral rays are made of microtubules which are the largest of the three main cytoskeleton components (microfilaments, intermediate filaments and microtubules) and radiate from the centrosphere. Before asters are formed, centrosomes are formed. These are also cytoskeleton structures consisting of two bundles of microtubules called centrioles which are stuck to each other at a right angle and normally stay near the cell's nuclear envelope. Right before mitosis or meiosis begins, the centrosome divides into two daughter centrosomes, and each centrosome migrates to the opposite side of the nucleus. As mitosis or meiosis begins, centrosomes create two new structures:
1. Spindle fibers, which connect the sister centrosomes to each other
2. Asters, which radiate out from the centrosome. The asters then provide support and guidance to the chromosomes, ensuring that chromosomes end up in the right place as mitosis occurs. Hence, the correct answer is option B.
An aster is a star-shaped cellular structure formed around each centrosome during mitosis or meiosis in an animal cell. They are considered part of the cytoskeleton. Astral rays are made of microtubules which are the largest of the three main cytoskeleton components (microfilaments, intermediate filaments and microtubules) and radiate from the centrosphere. Before asters are formed, centrosomes are formed. These are also cytoskeleton structures consisting of two bundles of microtubules called centrioles which are stuck to each other at a right angle and normally stay near the cell's nuclear envelope. Right before mitosis or meiosis begins, the centrosome divides into two daughter centrosomes, and each centrosome migrates to the opposite side of the nucleus. As mitosis or meiosis begins, centrosomes create two new structures:
1. Spindle fibers, which connect the sister centrosomes to each other
2. Asters, which radiate out from the centrosome. The asters then provide support and guidance to the chromosomes, ensuring that chromosomes end up in the right place as mitosis occurs. Hence, the correct answer is option B.
