What is the outermost layer found in the cell envelope of the bacterial cell called?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) –Glycocalyx
The outermost layer found in the cell envelope of the bacterial cell is called: Glycocalyx
The bacterial cell envelope is a complex structure that surrounds the cytoplasm and protects the bacterial cell. It consists of multiple layers, with the glycocalyx being the outermost layer. Here's a breakdown of the layers from outside to inside:
- Glycocalyx: This is a slimy or gel-like layer composed of polysaccharides, proteins, and sometimes lipids. It can help bacteria adhere to surfaces, resist desiccation (drying out), and evade the immune system.
- Cell wall: This rigid layer provides structural support and shape to the bacterial cell. It is typically made of peptidoglycan in most bacteria.
- Cytoplasmic membrane (or plasma membrane): This is a selectively permeable membrane that controls the passage of materials in and out of the cell. It is similar to the plasma membrane found in eukaryotic cells.
- Cytoplasm: This is the jelly-like interior of the cell that contains the cell's organelles and other structures.
So, the glycocalyx acts as the outermost barrier for the bacterial cell, contributing to various functions.