Question

the nitrogen cycle is critical for which of the following:
○ dna (nucleic acids)
○ protein
○ amino acids
○ all of the above

Explanation:

DNA has nitrogen in its structure (nucleotides have nitrogen - containing bases). Proteins are made of amino acids, and amino acids contain nitrogen. Amino acids themselves have nitrogen. So the nitrogen cycle provides nitrogen for all these (DNA, proteins, amino acids).

Answer:

D. All of the above