GCSE Combined Science (AQA)
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Cell Biology
Cell Structure
Prokaryotes
2:04
Prokaryotic Cells
Spec
4.1.1.1
- Prokaryotes are simple, single-cell organisms.
- All bacterial cells are prokaryotic.
- Bacteria vary in shape and size, including spherical, rod-shaped, and curved forms.
- Prokaryotic cells lack a nucleus and other internal membranes.
- Prokaryotic cells are smaller than eukaryotic cells, such as those of animals and plants.
- Prokaryotic cells predate eukaryotic cells.
- Bacteria evolved before plants and animal cells.
- The term "prokaryotic" comes from Greek words meaning "before the nucleus."
- Eukaryotic cells have a nucleus, while prokaryotic cells do not.
- In prokaryotic cells, genetic material is free in the cytoplasm, consisting of a single DNA loop and plasmids.
- For exams, it's important to know that prokaryotic cells contain cytoplasm, a cell membrane, a cell wall, and that their genetic material is not enclosed in a nucleus.
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135
questions for Cell Biology
17
questions for Cell Structure
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