Question

an analysis of a cell reveals a high level of phospholipids in the membrane, a high number of proteins in the cytoplasm being transported throughout the cell, and a high carbohydrate content within the cytoplasm. the researcher performing the analysis concludes that the compounds must serve different roles in the cell. however, a chemical analysis of these three compound types is also performed. which comparison best illustrates the similarity and difference in the elemental makeup of these molecules? a carbohydrates and proteins both contain carbon, hydrogen, and oxygen atoms, while the lipids contain sulfur in addition to those three elements. b carbohydrates and lipids both contain carbon, hydrogen, and oxygen atoms, while the proteins contain nitrogen in addition to those three elements. c carbohydrates and proteins both contain carbon, hydrogen, and oxygen atoms, while the lipids contain nitrogen in addition to those three elements. d carbohydrates and lipids both contain carbon, hydrogen, and oxygen atoms, while the proteins contain lithium in addition to those three elements.

Explanation:

Carbohydrates and lipids both contain carbon, hydrogen, and oxygen. Proteins, in addition to these three elements, contain nitrogen (a key component of amino groups in amino acids). Lipids do not typically contain nitrogen, and proteins do not contain lithium. Sulfur is present in some proteins but not a defining additional element for lipids.

Answer:

B. Carbohydrates and lipids both contain carbon, hydrogen, and oxygen atoms, while the proteins contain nitrogen in addition to those three elements.