Which of the following elements is essential to life because it is a component of proteins and nucleic acids?
A) Phosphorus
B) Sulfur
C) Chlorine
D) Bromine
E) Nitrogen

Question

Quizplus · Accepted Answer

Nitrogen is a component of proteins (amino acids) and nucleic acids (DNA and RNA). Phosphorus is also a component of nucleic acids, but not proteins. Sulfur is a component of some proteins, but not nucleic acids. Chlorine and bromine are not components of either proteins or nucleic acids.

Which of the Following Elements Is Essential to Life Because