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Welcome! Today we are going to explore the microscopic world of cells, which make up every single living thing on Earth.
Just like a house is built from individual bricks, all living organisms are built from tiny units called cells. Cells are the smallest structures that can perform all the functions of life.
Inside every cell, there is a gelatin-like fluid called cytoplasm, surrounded by a protective outer barrier known as the cell membrane. The cell membrane controls what goes in and out, like a friendly security guard.
Eukaryotic cells contain a special command center called the nucleus. The nucleus stores DNA, which contains all the instructions and blueprints the cell needs to grow and function properly.
Identify whether a cell with a defined nucleus and outer membrane is a prokaryotic or eukaryotic cell.
- 1. Recall that 'prokaryotic' means the cell lacks a defined nucleus (like bacteria).
- 2. Recall that 'eukaryotic' means the cell contains a membrane-bound nucleus holding its DNA.
- 3. Observe the given features: the cell has a defined nucleus containing its DNA.
- 4. Conclude that this cell must be a eukaryotic cell.