1. Plasma Membrane: This is the outermost layer of the cell, acting as a barrier between the cell's internal environment and the external environment. It controls what enters and exits the cell, essential for maintaining its integrity and function.
2. Ribosomes: These are tiny organelles responsible for protein synthesis. They translate genetic information from messenger RNA (mRNA) into proteins, which are crucial for all cellular processes.
3. DNA (Deoxyribonucleic Acid): This is the genetic material of the cell, containing instructions for building and maintaining the organism. While the specific DNA sequence differs between individuals and even cells within an individual, all mammalian cells contain DNA as their blueprint for life.
