Question

label the parts of the nucleotide.

Explanation:

1. The left - most labeled part (with the phosphate - like structure) is the phosphate group. This is because the structure \(\ce{ - O - P(=O)( - O^ - ) - O^ - }\) is characteristic of a phosphate group in a nucleotide.
2. The middle - upper labeled part (with the nitrogen - containing ring structure) is the nitrogenous base. Nitrogenous bases in nucleotides have nitrogen - containing heterocyclic rings, and the structure here with multiple \(N\) atoms in the ring fits this description.
3. The lower - middle labeled part (the 5 - membered ring with an \(O\) and several \(H\) and an \(\ce{OH}\) group) is the 5 - carbon sugar. The 5 - carbon sugar in a nucleotide (like ribose or deoxyribose) has a 5 - membered ring structure with carbon atoms (and an oxygen atom in the ring) and hydroxyl groups.

Answer:

• The left - most label: phosphate group
• The middle - upper label: nitrogenous base
• The lower - middle label: 5 - carbon sugar