article_snippet: Proteins are considered to be the workhorses of the cell built up from strings of amino acids.
article_snippet: Proteins carry out the biochemical reactions that take place in the cell and make life tick.
article_snippet: Lipids are fatty molecules that line up in formation that can create protective vesicles.
article_snippet: Lipids form the membrane 'walls' of every living cell and give Lipids structure.
article_snippet: Lipids are also essential for sending signals out of the cell.