Biological Molecules | Cells |

Life processes depend on biological molecules, whose structure is related to their function.

Did you know that living organisms are actually made from quite a small group of molecules? What do you think the most common molecule in you is?

It is actually water. About 55 to 60% of a human adult’s body weight comes from water. And in some organisms it can be up to 90% of their body weight!! [could show jellyfish here]
Your muscles and kidneys are particularly ‘watery’ at 79%, but even your bones have 31% water. Bet you didn’t expect that! Does that mean we really can walk on water?!

Ok, I’m done with the water for now. Imagine I removed all of the water from your body. What would be left? Well it would pretty much just be proteins, lipids, carbohydrates and nucleic acids such as DNA.

So what are these all made of? Well both carbohydrates and lipids are really simple; they both just contain three elements… carbon, hydrogen and oxygen.