Learn: Cell Biology

Welcome!Today we'll explore Cell Biology, including cell structure, function, and processes like microscopy, cell division, and transport mechanisms. Let's dive in step by step!

What is a Cell?A cell is the basic unit of life. All living organisms are made of cells, which carry out essential functions to keep them alive. Cells can be categorised into prokaryotic (simple cells without a nucleus) and eukaryotic (complex cells with a nucleus).

Cell StructureCells have various structures called organelles that perform specific functions. For example, the nucleus contains the genetic material (DNA), while the mitochondria are responsible for energy production. Plant cells also have a cell wall, chloroplasts, and a large central vacuole, which are absent in animal cells.

MicroscopyMicroscopy is the study of small structures using microscopes. There are two main types: light microscopes, which use light to magnify specimens, and electron microscopes, which use beams of electrons for higher magnification and resolution.

Cell Division: MitosisMitosis is a type of cell division that produces two identical daughter cells. It is essential for growth, repair, and asexual reproduction. The process includes several stages: prophase, metaphase, anaphase, and telophase.

Transport MechanismsCells use various methods to transport substances. Diffusion is the movement of particles from an area of high concentration to low concentration. Osmosis is the movement of water across a semi-permeable membrane. Active transport uses energy to move substances against their concentration gradient.

Review Time!Great work! You've learned about cells, their structure, division, and transport mechanisms. Now let's test your understanding with a few questions.