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The Cell Cycle
Draft 1
Anita Gill
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Act 1
Inside the body
Set on a white background, black and grey are used for the
details. Cells arewhizzing past the camera. Focusing on one, it
passes in slow motion.
A eukaryotic cell, unlike a prokaryotic cell, has a nucleus and
a numberof DNA molecules
The camera follows the cell as the shot speeds up. Reaching an
end with holes onthe surface, the cells go into the holes as the
camera follows one down the pipe
Cell division is the process in which a cell duplicates its DNA
therefore,producing more cells
Act 2
Checkpoint Pad
Close-up, view of the checkpoint. A white pad juts out of the
wall just below ahole. The cell shoots out of the hole floating on
the pad.
The Cell Cycle includes two Phases: Interphase and the Mitotic
Phase
Panning round, the cell is scanned, duplicated and propelled
towards the camera.
The process is repeated.
The cell goes through a checkpoint to ensure the phases
arecompleted
A third cell drops however, due to its defect state, is removed
from the systemthrough the pad.
If defect in some way, the cell is switched to a state that no
longerallows it to divide
A fourth cell drops. In slow motion, the cell floats on the
pad.
INTERPHASE
The first of the stages is Interphase, made up of 3 subphases,
G1, S andG2
The cell grows in size.
During G1, the cell begins to grow by producing, for example,
proteins
Zoom into the cell. The colours are inverted.
A chromosome appears on the screen and duplicates
In the next phase, S, the chromosomes are divided. These
arestructures which contain DNA. Each copy is called a sister
chromatid
Chromosome shrinks, appearing at the top of the screen.
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During the G2 phase, the cell continues to grow in preparation
for theMitotic phase or, the M phase
Act 3
MITOTIC PHASE
The M phase is made up of Mitosis, including the subphases,
Prophase,Prometaphase, Metaphase, Anaphase and Telophase, and
alsoCytokinesis
The other key elements that make up a cell are
Centrosomes appear on the screen
Centrosomes which deal with the organisation of microtubules.
Asingular centrosome is duplicated during Interphase
Centrosomes shrink, appearing at the top of the screen. A
Nuclear Envelopeappears
A Nuclear Envelope which contains the chromosomes
The Nuclear Envelope shrinks, appearing at the top of the
screen. The elements atthe top move into place, representing how
they would appear in a cell.
Centrosome moves, chromosomes condense and microtubules grow
Prophase: The uncondensed chromosomes, known as chromatin
beginto condense and one of the centrosomes begins to move to the
oppositeside of the cell. Microtubules grow between.
The centrosomes are on opposite sides of the cell and
chromosomes arecondensed
Prometaphase: The nuclear envelope begins to break away and
thespace gets intruded by the microtubules and the chromosomes
continueto condense
The chromosomes line up in the centre, pushed together by the
microtubules
Metaphase: The chromosomes line up on the metaphase plate
andbecome attached to the microtubules. Being pulled in
oppositedirections, the sister chromatids split
The microtubules pull back with chromosomes attached.
Anaphase: The microtubules pull back with the chromosomes
attached.The cell becomes stretched
A nucleus begins to form on the two sides.Zooming out, the cell
begins to split.
Telophase and Cytokinesis: Two nuclei form and the chromosomes
onceagain become less condensed. A cleavage furrow, pinching the
cell, leadsthem to split into two. Cell division is complete
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Zooming out further, a spherical area is revealed, showing the
vast number of cellsand checkpoints.
