Question

how are proteins and nucleic acids related?
○ they both provide energy.
○ they both carry genetic information.
○ the structure of proteins is determined by nucleic acids.
○ the subunits of nucleic acids are also the subunits of proteins.

Explanation:

• Option 1: Proteins are not a primary energy source (carbohydrates and fats are), and nucleic acids don't provide energy, so this is incorrect.
• Option 2: Only nucleic acids (DNA, RNA) carry genetic information; proteins do not, so this is incorrect.
• Option 3: Nucleic acids (DNA and RNA) contain the genetic code that determines the sequence of amino acids in proteins, thus determining protein structure. This is correct.
• Option 4: Nucleic acid subunits are nucleotides, while protein subunits are amino acids—they are different, so this is incorrect.

Answer:

C. The structure of proteins is determined by nucleic acids.