Final Answer:
The statement "Both take on structural roles in the cell" is true. Proteins and nucleic acids both play structural roles in cellular functions. Option C is answer.
Step-by-step explanation:
Proteins and nucleic acids are essential biomolecules in cells with distinct functions. The provided options can be evaluated as follows:
a. Both contain sulfur: This statement is true for proteins, which may contain sulfur-containing amino acids, but not generally true for nucleic acids.
b. Monomers of both contain phosphorus: This is true for nucleic acids, where monomers (nucleotides) contain phosphorus, but not for proteins.
c. Both take on structural roles in the cell: This statement is accurate. Proteins contribute to cell structure (e.g., collagen in connective tissues), and nucleic acids, particularly DNA, provide the genetic blueprint for cellular structure.
d. Both have primary and secondary structure: This statement is true for proteins, which have primary, secondary, tertiary, and quaternary structures. Nucleic acids, however, primarily have primary and secondary structures.
Option C) Both take on structural roles in the cell is the answer.