Final answer:
A food sample containing trace amounts of sulfur is most likely a protein, as proteins consist of amino acids like cysteine and methionine which contain sulfur. The correct answer is D. Protein.
Step-by-step explanation:
If a sample of food was analyzed and found to contain trace amounts of sulfur, this sample would most likely be protein. Proteins are composed of amino acids, some of which contain sulfur, notably cysteine and methionine. This is unlike lipids, starches, and simple sugars like glucose, which do not typically contain sulfur.
Therefore, sulfur is a distinguishing element that is often associated with proteins in foods such as meats and nuts.
Based on the information provided, the sample of food that contains trace amounts of sulfur is most likely option D. Protein.
Sulfur is an essential element found in proteins, specifically in the amino acids cysteine and methionine. Foods rich in proteins, such as meat and fish, are good sources of sulfur.