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Question
prokaryotes and eukaryotes. prokaryotes relative size smaller location of dna organelles? example eukaryotes yes explain how surface area limits cell size
Prokaryotes are smaller. Their DNA is in the cytoplasm (no - nucleus). They lack membrane - bound organelles, e.g., bacteria. Eukaryotes are larger, have DNA in the nucleus, and have membrane - bound organelles, e.g., plant and animal cells. As cell size increases, the surface area to volume ratio decreases. Nutrient and waste exchange occurs across the cell membrane (surface area). A lower ratio means less efficient exchange, thus surface area limits cell size.
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| Relative Size | Location of DNA | Organelles? | Example | |
|---|---|---|---|---|
| Eukaryotes | Larger | Nucleus | Yes | Plant cells, Animal cells |
Surface area limits cell size because as a cell grows, its volume increases faster than its surface area. Nutrients and waste need to cross the cell membrane (surface area). A low surface - area to volume ratio makes this exchange less efficient.