CELL CYCLE & CELL DIVISION
BRAINSTORMING
Cell cycle refers to the series of events that
results in the duplication of the cell along with
the DNA.
The stages of cell cycle include:
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
4 major stages of mitosis:
prophase
metaphase
anaphase
telophase.
The different phases of a cell cycle include:
Interphase – This phase includes the G1
phase, S phase and the G2 phase.
M phase – This is the mitotic phase and
is divided into prophase, metaphase,
anaphase and telophase.
Cytokinesis – In this phase the
cytoplasm of the cell divides.
Who discovered cell cycle?
Walther Flemming discovered cell cycle
in the 19th century. He was a professor
at the Institute of Anatomy.
The importance of cell division:
It helps in the survival and growth of
organisms.
Maintenance of chromosome number.
Renewal of damaged cells
Which is the most important stage of cell cycle?
Interphase is the most important stage
of cell cycle. The cell stays in the
interphase for maximum periods.
During this phase the cell prepares itself
for division. The cell undergoes cell
growth and replication during this
phase.
What is the significance of G1, S and G2 phases
of the interphase?
During the G1 phase the cell continues
to grow but does not replicate.
During the S phase the DNA of the cell
replicates.
During the G2 phase the RNA, proteins
and other macromolecules required for
mitotic division are produced by the
cell.
G0 phase:
- These cells may exit the G1 phase and
enter a resting state called G0 phase.
-In G0, a cell is not actively preparing to
divide, it’s just doing its job. For
instance, it might conduct signals as a
neuron or store carbohydrates as a liver
cell.
-G0 is a permanent state for some cells,
while others may re-start division if
they get the right signals.
