Question

cell cycle and cell division​

Answer 1

Answer:

 cell cycle, or cell-division cycle, is the series of events that take place in a cell leading to duplication of its DNA (DNA replication) and division of cytoplasm and organelles to produce two daughter cells. In bacteria, which lack a cell nucleus, the cell cycle is divided into the B, C, and D periods. The B period extends from the end of cell division to the beginning of DNA replication. DNA replication occurs during the C period. The D period refers to the stage between the end of DNA replication and the splitting of the bacterial cell into two daughter cells.[1] In cells with a nucleus, as in eukaryotes, the cell cycle is also divided into two main stages: interphase and the mitotic (M) phase (including mitosis and cytokinesis). During interphase, the cell grows, accumulating nutrients needed for mitosis, and undergoes DNA replication preparing it for cell division. During the mitotic phase, the replicated chromosomes and cytoplasm separate into two new daughter cells. To ensure the proper division of the cell, there are control mechanisms known as cell cycle checkpoints.

The cell-division cycle is a vital process by which a single-celled fertilized egg develops into a mature organism, as well as the process by which hair, skin, blood cells, and some internal organs are renewed. After cell division, each of the daughter cells begin the interphase of a new cycle. Although the various stages of interphase are not usually morphologically distinguishable, each phase of the cell cycle has a distinct set of specialized biochemical processes that prepare the cell for initiation of the cell division

Answer 2

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Define cell division and cell cycle .

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Cell division :-

Cell division is the process by which a parent cell divides into two or more daughter cells.

Cell division is the process by which a parent cell divides into two or more daughter cells. It was first observed by Prevost and Dumas ( 1824 ) in ZYGOTE of frog and also by Nageli in plant cell ( 1824 ).

Cell Cycle :-

Cell Cycle :- It is a series of programmed cyclic changes by which the cell duplicate its contents and divided into two parts .

Cell Cycle :- It is a series of programmed cyclic changes by which the cell duplicate its contents and divided into two parts .It was described by Howard and Pelc ( 1953 )

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