CELL CYCLE AND CEL
DIVISION
,• Growth and reproduction of all organisms depend on the division and
enlargement of cells.
• The mechanism of division and multiplication of cells together constitute
reproduction.
,CELL CYCLE
• It is the life period of a cell during
which a cell synthesizes DNA
(replication), grows and divides
into two daughter cells.
• Cell growth (cytoplasmic increase)
is a continuous process.
• DNA synthesis occurs only at a
specific stage.
, CELL CYCLE
• Duration of cell cycle varies
in each organism and each
cell type.
• Duration of a typical
eukaryotic cell cycle (e.g.
human cell) is about 24
hours.
• In Yeasts, it is only about
ninety minutes
DIVISION
,• Growth and reproduction of all organisms depend on the division and
enlargement of cells.
• The mechanism of division and multiplication of cells together constitute
reproduction.
,CELL CYCLE
• It is the life period of a cell during
which a cell synthesizes DNA
(replication), grows and divides
into two daughter cells.
• Cell growth (cytoplasmic increase)
is a continuous process.
• DNA synthesis occurs only at a
specific stage.
, CELL CYCLE
• Duration of cell cycle varies
in each organism and each
cell type.
• Duration of a typical
eukaryotic cell cycle (e.g.
human cell) is about 24
hours.
• In Yeasts, it is only about
ninety minutes
