1. Membrane-bound nucleus: Both plant and animal cells have a true nucleus, enclosed by a double membrane called the nuclear envelope. This nucleus houses the cell's genetic material, DNA, in the form of chromosomes.
2. Membrane-bound organelles: Eukaryotic cells contain a variety of specialized, membrane-bound organelles that carry out specific functions. These organelles include:
* Mitochondria: responsible for energy production (ATP).
* Endoplasmic reticulum (ER): involved in protein synthesis and lipid metabolism.
* Golgi apparatus: processes and packages proteins.
* Lysosomes: break down waste materials.
* Vacuoles: store water, nutrients, and waste.
3. Complex cytoskeleton: Both plant and animal cells possess a complex network of protein filaments that provide structural support, enable movement, and transport materials within the cell.
4. Larger cell size: Eukaryotic cells are generally larger than prokaryotic cells, typically ranging from 10 to 100 micrometers in diameter.
5. Linear DNA: The DNA in eukaryotic cells is organized into linear chromosomes, whereas prokaryotic cells have a single, circular chromosome.
In contrast, prokaryotic cells lack:
* A true nucleus
* Membrane-bound organelles
* A complex cytoskeleton
These differences reflect the evolutionary history and complexity of eukaryotic cells. Eukaryotic cells evolved from prokaryotic ancestors through a process called endosymbiosis, where certain prokaryotes were engulfed by other cells and became incorporated as organelles. This evolutionary event gave rise to the unique features of eukaryotic cells, including their membrane-bound nucleus and other organelles.
