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Biology B2
Cells
Umar




1

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Animal & Plant Cells


Animal Cells contain the following:
Nucleus ­ contains genetic material
Cytoplasm ­ where most chemical reactions take place, controlled by enzymes
Cell Membrane ­ Holds the cell together
Mitochondria ­ Where respiration takes place
Ribosomes ­ Where proteins are made (protein synthesis)



Plant Cells contain the…

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Specialised Cells


Cells Function Adaption
Absorbs light energy for Packed with chloroplasts.
photosynthesis Regular shaped, closely
packed cells form a
continuous layer for efficient
absorption of sunlight.


Leaf Cell
Absorbs water and mineral Long 'fingerlike' process
ions from the soil with very thin wall, which
gives a large surface area.…

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Diffusion


Diffusion ­ the movement of particles from an area of high concentration to an area of low
concentration
Diffusion occurs in both liquids and gases
The bigger the difference in concentration, the faster the rate of diffusion
This is how the smell of cooking travels around the house from…

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Osmosis
Osmosis is the movement of water molecules across a partially permeable membrane from a
region of high water concentration to a region of low water concentration
A partially permeable membrane allows small molecules such as water to pass through but
doesn't allow larger particles through
Water moves into and…

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Summary of Topic
Animal and plants are made of cells
Animal and plant cells have features in common.
But plant cells also have additional features such as a cell wall, chloroplasts and a permanent
vacuole
Cells may be specialised to carry out particular functions
Dissolved substances pass into and out…

Comments

Swallowtail

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This set of notes on cells has some good colour annotated diagrams and presents the key facts clearly.  Cell biology is a topic found in most GCSE Biology specifications.  Team these up with some revision cards or flashcards on the same topic  for a complete set.

JamesPortman

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Found very useful to influence my revision on C1.1 

JamesPortman

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meant B1.1 lol

RaulLobo25

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thank you

this helped me alot

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