Question

homework - dna
possible points 11.11
which explanation best describes the molecule shown?
structures x, y, and z represent a nucleotide of a double - stranded dna molecule.
structures x, y, and z represent a phosphate group of a double - stranded dna molecule.
structures x, y, and z represent an amino acid on an rna molecule with a 5 - carbon ribose sugar.
structures x, y, and z represent a gene on an rna molecule with a 5 - carbon ribose sugar.

Explanation:

A nucleotide in DNA consists of a phosphate group (X), a deoxyribose sugar (Y), and a nitrogen - containing base (Z). RNA has ribose sugar instead of deoxyribose and the question refers to DNA (as it's double - stranded). Amino acids are building blocks of proteins, not part of DNA/RNA structure in this context. A gene is a segment of DNA (or RNA in some viruses) with a specific function, not just three components like X, Y, Z.

Answer:

Structures X, Y, and Z represent a nucleotide of a double - stranded DNA molecule.