Question

choose the correct sequence of terms to fill in this sentence correctly:
____ are subunits of __, which code for the next __ in a sequence that makes up ____.

○ amino acids, proteins, nucleotide, a dna molecule
○ dna molecules, nucleotides, protein, an amino acid
○ nucleotides, dna molecules, amino acid, a protein
○ proteins, amino acids, dna molecule, a nucleotide

Explanation:

To solve this, we analyze the biological relationships:

• Nucleotides are the subunits (monomers) of DNA molecules (polymers).
• DNA (via RNA) codes for amino acids, which are the subunits of proteins. So the sequence should be: Nucleotides (subunits of) DNA molecules, which code for the next amino acid in a sequence that makes up a protein.
• Let's check other options:
• First option: Amino acids are subunits of proteins, but proteins don't code for nucleotides, and DNA's subunits are nucleotides, not amino acids. Incorrect.
• Second option: DNA molecules are made of nucleotides (not the other way), and DNA codes for amino acids (not proteins directly in that way). Incorrect.
• Fourth option: Proteins are made of amino acids (reverse here), and the coding relationship is wrong. Incorrect.

Answer:

C. Nucleotides, DNA molecules, amino acid, a protein