What are functional groups?

A functional group is like a special tool that helps molecules do their jobs, just like tools help you build things.

Imagine you have a box of toy blocks. Each block can be connected to others in different ways, depending on what kind of tool it has on one side. In chemistry, these tools are called functional groups, and they're attached to the main part of a molecule, like how a tool is attached to a block.

Think of a carbohydrate as a big toy block with a tool on its side, maybe it's a hook. This hook lets it connect to another block, like sugar connecting to another sugar. That’s what happens in starch or glycogen!

Now imagine a protein, that's like a long chain of blocks, each holding different tools. Some might have hooks, some might have sticky ends, and these tools help the protein do things like move muscles or carry messages.

Each time you add a new tool to a block, it changes how the molecule can interact with others. That’s why having the right functional group is so important, it's like choosing the best tool for the job!