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Functional Groups

Across
This group is at the end of a carbon skeleton.
Forms a "cross-link" that helps stabilize protein structure. Compound name is Thiol.
Affects the expression of genes when on DNA or on proteins bound to DNA. Affects the shape and function of male and female sex hormones.
It is polar due to electronegative oxygen. Also forms hydrogen bonds with water.
Down
Acts as an acid because the covalent bond between oxygen and hydrogen is so polar. Can also donate a Hydrogen ion.
Can pick up a hydrogen ion from its surrounding solution. Acts as base.
This group is within a carbon skeleton.
Contributes a negative charge when positioned inside a chain of phosphates and also when at the end of a chain. When attached, it confers on a molecule the ability to react with water, releasing energy.