Dr. Ali -PhD || PU 🇮🇳 on Instagram: "The plasma membrane, also known as the cell membrane, is a thin, flexible barrier that surrounds the cell, separating its internal contents from the external environment. It is primarily composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates, which together maintain its structure and function. The plasma membrane is selectively permeable, meaning it allows certain substances like nutrients, gases, and water to pass through

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