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1.2 Cell Structure and Organisation
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A Levels WJEC AS Biology Mind Map on 1.2 Cell Structure and Organisation, created by amyroskilly on 17/04/2014.
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wjec as biology
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amyroskilly
, updated more than 1 year ago
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amyroskilly
over 10 years ago
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Resource summary
1.2 Cell Structure and Organisation
Cell Organisation
Two different types of cells
Prokaryotic Cells
Found in bacteria and blue-green algae
No membrane-bound organelles
DNA lies free in the Cytoplasm
No nuclear membrane or ER
Ribosomes are smaller
Cell wall containing murein
Eukaryotic Cells
Found in plants, animals, fungi and protoctists
Membrane-bound organelles
DNA located on Chromosomes
Distinct membrane-bound nucleus
Ribosomes are larger
Cell wall in plants made of cellulose
Viruses
causes a variety of infectious diseases in humans, animals and plants
They are extreamely small
can be called a 'non-cell'
no cytoplasm
no organelles
no chromosomes
Outside a living cell a virus exists as an invert 'viron'
Made up of two comonents
Nucleic acids
protein coat
Cell Structure
Cytoplasm
highly organised
consisting of a soluble ground substance called cytosol
Nucleus
controls the cell's activities
contains chromosimes
nuclear envelope
double membrane around the nucleus
has pores in it to allow transport of mRNA
nucleoplasm
the cytoplasm type substance in the nucleus
contains chromatin
DNA bound to protein
Nucleolus
Manufactures RNA which is needed to make ribosomes
Mitochondrion
Sites of ATP Synthesis
Endoplasmic Reticulum (ER)
Rough
ribosomes on the outer surface
transporting proteins made by the ribosomes
Smooth
membrane with a lack of ribosomes
Concerned with they synthesis and transport of lipids
ribosomes
protein synthesis
Golgi Body
produces secretory enzymes
secreting carbohydrated
Producing glycoprotein
Transporting and storing lipids
Forming lysosomes
Lysosomes
contain and isolate digestive enzymes
Centrioles
during cell division they divide and go to the poles
synthesise the microtubules of the spindle
Chloroplasts
found in cells of photosynthrsising tissue
sites of photosynthesis
Vacuole
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