Dan is a body builder. He decides that he is going to change his diet in an effort to increase his muscle mass. Dan tells you that he plans to eat vegetables and proteins but no fats or carbohydrates, because cells do not naturally contain these molecules and do not need them. You advise Dan that his new diet is not a good choice, and that he would do better to follow a well balanced diet that incorporates healthy amounts of proteins, fats AND carbohydrates.
-You tell Dan that while many of his cell components do indeed contain amino acids, carbohydrates and lipids are also essential for cells. Which of the following components contain both amino acids AND lipids?
A) Cytoplasmic membrane
B) Nucleic acids
C) Enzymes
D) Peptidoglycan
E) Ribosomes

Question

Quizplus · Accepted Answer

The cytoplasmic membrane is composed of phospholipids, which contain both a polar head (containing phosphates and glycerol) and nonpolar fatty acid tails (containing lipids). Additionally, many proteins in the membrane contain amino acid residues and may contain lipid modifications such as fatty acid tails or isoprenyl groups. The other choices do not contain both amino acids and lipids as major components.

Dan Is a Body Builder