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BIOLOGY- CELLS
All living organisms are made up of cells. We can only see them using a microscope.

LIGHT MICROSCOPE- an instrument used to magnify specimens using lenses and light, e.g.
in school whereas electron microscope uses a beam of electrons

ANIMAL AND PLANT CELLS




Animal cell Plant cell
Nucleus…

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Chemical reaction in cell

Cell chemistry always works because it is controlled by an enzyme. Each enzyme is a
protein which controls the rate of specific reaction; it makes sure that the reaction takes
place without becoming mixed up with any other reaction.
Enzymes involved in different chemical processes are…

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CONE CELL FROM HUMAN EYE
They are in the light sensitive layer of your cells (retina).
Outer segment- They make it possible for you to see in colours
contains visual
3 main adaptations:
pigment
Outer segment is filled with a special chemical called
visual pigment; this change chemically in coloured…

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DIFFUSION OSMOSIS ACTIVE
The net movement of particles It is a special case of diffusion, where only TRANSPORT
of gas or solute from an area of water moves across a partially permeable
high concentration to low membrane The movement
concentration. TAKES PLACE Internal concentration of cells need to be of…

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