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Molecules That Form Structure
Bonding the Same Molecules Together
Many materials are made of the same kinds of molecules linked together many times and then stacked together like bricks in a wall to form large complexes. Similar to building a puzzle, visitors fit small molecules together to make larger molecules. Simple molecules built into long chains make new molecules that can be used to build structures in an organism. For example, the cellulose molecules in wood are made up of many glucose molecules linked together in a chain. These chains are later stacked together to make a strong structure that supports the wood- similar to linking paperclips together in a long chain. Although only examples of stacked chains are provided, chains can also be twisted into structures.
Molecules that Form Structure: Computer Interactive
Visitors investigate the molecular structures of four different organisms at this computer exhibit. Stepping through a set of images, visitors first identify familiar living things until they reach a chain of molecules that form a structure in each living thing. This exhibit, as well as the others like it in Marvelous Molecules, give the sense of scale between living things and the molecules they are made up of.
Stacks of Glucose Molecules Make Cellulose Molecules
This floor-to-ceiling model of cellulose shows a small part of one cellulose molecule. If it had thousands of glucose units as a real cellulose molecule does, this model would tower more than a mile high. As visitors walk onto the main level of the museum, it's difficult not to notice the giant overhanging glucose molecule that has been installed above the Marvelous Molecules exhibition. The glucose molecule is the main energy source for many living things and is the icon for the chemistry exhibits.
Molecules Make Strong Biological Structures
At this exhibit, wool, silk, a crab shell, wood and a bone sample demonstrate molecule chains that provide strength and protection to living things. These molecular structures are not broken down easily even after the animal or plant is dead. The way molecules are linked together aids in determining the properties of that structure. Some molecules might be bonded to each other in lots of directions to form a rigid, hard structure such as wood or a crab shell. Other molecules might be able to slide past each other to make a flexible structure such as wool or silk.