Question

Differentiate cytokinesis in plant cells and animal cells.

Answer 1

1. Cytokinesis in Plant Cells:
   Division of the cytoplasm often starts during telophase. In plants, cytokinesis cell plate grows from the center towards lateral walls centrifugal manner of cell plate formation. Phragmoplast contains microtubules, actin filaments and vesicles from golgi apparatus and ER. The golgi vesicles contains carbohydrates such as pectin, hemicellulose which move along the microtubule of the phragmoplast to the equator fuse, forming a new plasma membrane and the materials which are placed their becomes new cell wall. 
   The first stage of cell wall construction is a line dividing the newly forming cells called a cell plate. The cell plate eventually stretches right across the cell forming the middle lamella. Cellulose builds up on each side of the middle lamella to form the cell walls of two new plant cells.
2. Cytokinesis in Animal Cells:
   It is a contractile process. The contractile mechanism contained in the contractile ring located inside the plasma membrane. The ring consists of a bundle of microfilaments assembled from actin and myosin. This fibril helps for the generation of a contractile force. This force draws the contractile ring inward forming a cleavage furrow in the cell surface dividing the cell into two.