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Cell Biology - Biology Paper 1
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Cards (15)
Nucleus
Genetic
material, controls cell activity
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Cytoplasm
Where chemical reactions take place, controlled by cell
membrane
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Cell membrane
Controls what goes in and out, contains
enzymes
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Mitochondria
Site of
respiration
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Ribosome
Site of
protein synthesis
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Cell wall
Provides strength and shape, made of
cellulose
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Chloroplasts
Contain
chlorophyll
, site of
photosynthesis
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Vacuole
Contains
cell sap
, keeps cell
turgid
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Sperm cell
Streamlined
head
Tail
for swimming to the egg
Lots of
mitochondria
to generate
energy
to swim
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Nerve cell
Long and
thin
to cover distances
Branches
to connect to other cells
Makes signals
faster
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Muscle cell
Long to have
space
to
contract
Lots of
mitochondria
to generate energy for
contraction
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Total
magnification
objective
lens x eye piece
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Magnification =
image size
÷
actual size
Egg organism development
1. After
fertilisation
the
zygote
divides again and again through
mitosis
until it becomes a ball of cells
2. The cells
diffrentiate
into specialised cells like
blood
,
nerve
and
muscle
cells
3. Cells form an
embryo
4. As the cells
diffrentiate
more
tissues
and
organs
are formed to make a
foetus
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Microscope practical
1. Place
specimen
on
slide
2. Add drop of stain (
methylene
blue
or
iodine)
3. Place
coverslip
on specimen
4. Place
slide
onto
stage
of microscope
5. Turn on the
light
source
6. Set the
objective
lens to
lowest
power
7. Look through
eyepiece
and adjust
coarse
focusing
wheel
for a
clear
image
8. Increase the
power
of objective lens to increase
magnification
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