Question

1. what is the structure?

ho—c(=o)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)(h)—c(h)(h)—c(=c)—c(h)(h)—c(=c)—c(h)(h)—c(=c)—c(h)(h)—c(h)(h)—h

options:

• aldehyde
• fatty acid
• methane
• monosaccharide

Explanation:

This molecule has a long hydrocarbon chain with a carboxylic acid functional group ($\text{-COOH}$) at one end, which is the defining structure of a fatty acid. Aldehydes have an $\text{-CHO}$ group, methane is a single carbon molecule, and monosaccharides are sugar molecules with a different structure containing hydroxyl and carbonyl groups in a ring or linear sugar backbone.

Answer:

fatty acid