Different in covalent arrangements of their atoms.

Same covalent partnership but different in spatial arrangements. They arise from the inflexibility of double bonds.

Molecules that are mirror images of each other. Usually involve an asymmetric carbon.

A group of atoms attached to a carbon skeleton that have consistent properties. Their number and kind give properties to the molecule.

A hydrogen atom bonded to an oxygen atom that is very polar, allowing the material to be hydrophillic. They form alcohols. (-OH)

A carbon atom joined to an oxygen atom by a double bond. Aldehydes and Ketones are the two types of compounds in this group. (-C=O)

Sulfur bonded to a hydrogen. This forms compounds called thiols that help with protein structure. (-SH)

Phosphorous with four oxygen atoms that causes a net -2 charge. Sometimes written as "Pi", and involved with energy transfers. Also is acidic. (-PO4)

Carbon bonded to three hydrogens. It is very non polar and therefore hydrophobic. (-CH3)

What is shown in the diagram?

ATP is the main __________________ for cells.