What three components do eukaryotic and prokaryotic cells share?
A cell membrane, cytoplasm and genetic material (DNA).
AQA GCSE Biology - Foundation (8461) · 4.1.1.1
Revise AQA GCSE Biology - Foundation (8461) specification point 4.1.1.1, Eukaryotes and prokaryotes, with free active-recall flashcards. Flip through the set or review every question and answer below.
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What three components do eukaryotic and prokaryotic cells share?
A cell membrane, cytoplasm and genetic material (DNA).
What role does the cell membrane play?
It forms a boundary around the cytoplasm and controls movement of substances into and out of the cell.
How does the organisation of genetic material distinguish eukaryotic from prokaryotic cells?
In eukaryotic cells, genetic material is enclosed within a nucleus. In prokaryotic cells, it is not.
Which type of cell is found in plants and animals, and which is found in bacteria?
Plant and animal cells are eukaryotic; bacterial cells are prokaryotic.
How does the size of a bacterial cell compare with plant and animal cells?
A bacterial cell is much smaller.
What surrounds the cell membrane of a bacterial cell?
A cell wall.
How is the main DNA organised in a bacterial cell?
It forms a single loop in the cytoplasm.
What are bacterial plasmids?
Small rings of DNA separate from the main DNA loop.
Are plasmids present in every bacterial cell?
No. A bacterial cell may have one or more plasmids, or none.