DNA subunit is called what?

DNA subunit is called what?

• A. Nucleotide
• B. Amino acid
• C. Polynucleotide
• D. Nucleoside

Answer: (A)

DNA is built from nucleotide units. Each nucleotide contains a deoxyribose sugar, a phosphate group, and a nitrogenous base. The phosphate connects the sugars of adjacent nucleotides, forming phosphodiester bonds that create a long polymer called a polynucleotide—the DNA molecule. So the subunit that makes up DNA is the nucleotide. A nucleoside lacks the phosphate group, and a polynucleotide is the chain made from many nucleotides. Amino acids, by contrast, are the building blocks of proteins, not DNA.

DNA is built from nucleotide units. Each nucleotide contains a deoxyribose sugar, a phosphate group, and a nitrogenous base. The phosphate connects the sugars of adjacent nucleotides, forming phosphodiester bonds that create a long polymer called a polynucleotide—the DNA molecule. So the subunit that makes up DNA is the nucleotide. A nucleoside lacks the phosphate group, and a polynucleotide is the chain made from many nucleotides. Amino acids, by contrast, are the building blocks of proteins, not DNA.