Choose the correct answer.

DNA \(deoxyribonucleic acid\) is one of two types of nucleic acids. It has smaller units called nucleotides, joined into chains through dehydration synthesis. Every nucleotide monomer consists of a five-carbon \(pentose\) sugar that is bonded to one of five nitrogen-containing bases and at least one phosphate group. These five nitrogen-containing bases are adenine, guanine, cytosine, thymine and uracil. Some of the bases \(cytosine, thymine, and uracil\) have a single ring made of carbon and nitrogen atoms. The other bases \(adenine and guanine\) have two such rings. The sequence of bases in DNA determines the sequence of amino acids in proteins. DNA, as we said above, is a nucleic acid that is found in the genes.

What chemicals does a DNA molecule contain?

• A nucleic acid
• Nitrates
• Phosphates
• Proteins