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Summary Eduquas (England) A level biology paper 1: Microbiology $6.46
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Summary Eduquas (England) A level biology paper 1: Microbiology

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This includes notes on a-level biology microbiology: - Bactria - Classification - Staining - Aseptic techniques - Measuring growth

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  • January 31, 2024
  • 9
  • 2023/2024
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topic 17
Microbiology
- Bacteria
- Classification
- Staining
- Bacterial conditions
- Aseptic techniques
- Measuring growth

, Bacteria

Prokaryotes Eukaryotes
Length 1 – 10 10 – 100
micrometres micrometres
Organelles No membrane Membrane bound
bound organelles
organelles
DNA Has DNA in Has DNA in
cytoplasm nucleolus
Nucleus NO Yes, 9dobble
envelope membrane
Plasmids Yes No
Cell wall Peptidoglycan Cellulose = plant
composition (murine) Chitin = fungi
Chloroplasts No (llememae) Yes
Mitochondria No Yes
Mesosome Yes No
Ribosomes size 70s 80s

1cm 3 of water = 1 million bacteria
1g of soil = 40 million bacteria
Human gut = 1014 bacteria
Worldwide = 5x1030

Differences in bacteria
- Size
- Shape
- Composition of cell wall
- Genetic differences

An antigen is a protein marker that causes an antibody
response

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