Are amines functional groups that contain nitrogen?

Amines are indeed functional groups that contain nitrogen. This classification of compounds includes a nitrogen atom bonded to one or more carbon atoms. The presence of the nitrogen atom is essential to the definition of amines, as this is what distinguishes them from other functional groups.

Amines can be categorized into three main types based on how many carbon-containing groups are attached to the nitrogen: primary, secondary, and tertiary amines. In each case, the nitrogen atom is pivotal to the amine's properties and reactivity.

The other choices incorrectly attribute the presence of other elements to amines. For example, associating amines with oxygen would suggest a different functional group, such as alcohols or ethers, which do not contain nitrogen. Similarly, relating amines to sulfur or incorrectly asserting that they do not contain nitrogen misrepresents the fundamental characteristics of these compounds. Understanding the composition of functional groups like amines is crucial for grasping their role in organic chemistry and biochemistry.