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Osmosis is a special case of diffusion, which you can imagine as a spreading of particles across a room for example when you spray some deodorant - the strongest smell is closest to the area that has just be...

Animals and plants are made up of tiny building blocks called cells. There are different types of cells that do different things, and cells that are similar to each other are grouped together in what's calle...

Cells are the basic building blocks of all living organisms. A tissue is a group of cells with a similar structure and function. Organs are aggregations of tissues performing specific functions. Organs are o...

Reduced NAD and FAD from the Krebs cycle are re-oxidised in the electron transport chain, situated on the inner mitochondrial membrane. The electrons are passed down the protein complexes embedded in the ele...

An enzyme is a protein that speeds up a chemical reaction. For example, the food you had for your lunch today was probably made up of complex carbohydrates, proteins and lipids. These need to be broken down ...