Context: The vast majority of living organisms encode their genes in long strands of DNA (deoxyribonucleic acid). DNA consists of a chain made from four types of nucleotide subunits, each composed of: a five-carbon sugar (2'-deoxyribose), a phosphate group, and one of the four bases adenine, cytosine, guanine, and thymine.:2.1

Question: What do the vast majority of living organisms encode their genes in?
Answer: long strands of DNA (deoxyribonucleic acid)

Question: What does DNA consist of?
Answer: a chain made from four types of nucleotide subunits

Question: What type of sugar composes part of the DNA molecule?
Answer: a five-carbon sugar (2'-deoxyribose)

Question: What are the four bases used in nucleotide subunits?
Answer: adenine, cytosine, guanine, and thymine

Question: Besides the sugar and the four bases, what else does DNA consist of?
Answer: a phosphate group