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## Bacteria ### Gram-Positive * Prokaryotic cells * Membrane-bound nucleus is absent * Cells are smaller in size * Single chromosome is present * Membrane-bound organelles are absent * Glycocalyx may be as loose sheath in some bacteria called slime layer. In some other bacteria, Glycocalyx may be...

## Bacteria ### Gram-Positive * Prokaryotic cells * Membrane-bound nucleus is absent * Cells are smaller in size * Single chromosome is present * Membrane-bound organelles are absent * Glycocalyx may be as loose sheath in some bacteria called slime layer. In some other bacteria, Glycocalyx may be thick and tough called capsule. * Cell wall determines the shape of the cell * It provides a strong structural support to prevent the bacterium from bursting or collapsing * Plasma membrane - it is semi-permeable having *mesosomes* in the form of vesicles, tubules, and lamellae. They help in cell wall formation, DNA replication & distribution to daughter cells. It also interacts with the outside world. They also help in *re-secretion* process, to increase the surface area of the plasma membrane & enzymatic content. ### Gram-Negative * Eukaryotic cells * Membrane-bound nucleus is present * Cells are larger in size * More than 1 chromosome is present * Membrane-bound organelle are present ### Structures * **Mesosome**: which is plasma membrane * **In prokaryotes**: other membranes as cytoplasm contain proteins * **Motile Bacteria**: composed of 4 fimbriae, that help other substances to transport.