which element is always present in proteins but not in carbohydrates or lipids? sulfur nitrogen phosphorus…
which element is always present in proteins but not in carbohydrates or lipids? sulfur nitrogen phosphorus calcium
Answer
Brief Explanations:
Carbohydrates and lipids are composed mainly of carbon, hydrogen, and oxygen. Proteins are made up of amino - acids, and nitrogen is a key component of amino - acids. Sulfur can be present in some proteins but not always, phosphorus is not a main component of basic protein structure, and calcium is not a component of proteins.
Answer:
Nitrogen