Which of the following are components of a nucleotide?

Which of the following are components of a nucleotide?

• A. Phosphate group
• B. Sugar
• C. Nitrogen base
• D. All of the above

Answer: (D)

A nucleotide is built from three parts: a sugar, a phosphate group, and a nitrogenous base. The sugar (deoxyribose in DNA, ribose in RNA) provides the attachment point for the base and links to the phosphate group, forming the backbone of the molecule. The phosphate group connects nucleotides together through phosphodiester bonds, building the long chains of DNA or RNA. The nitrogenous base is the informational part, encoding genetic instructions by pairing with its complementary base during replication and transcription. Since every nucleotide contains all three components, the statement that includes all of them is correct. (In case you see energy-carrying nucleotides like ATP, they still have the same three components plus extra phosphate groups.)

A nucleotide is built from three parts: a sugar, a phosphate group, and a nitrogenous base. The sugar (deoxyribose in DNA, ribose in RNA) provides the attachment point for the base and links to the phosphate group, forming the backbone of the molecule. The phosphate group connects nucleotides together through phosphodiester bonds, building the long chains of DNA or RNA. The nitrogenous base is the informational part, encoding genetic instructions by pairing with its complementary base during replication and transcription. Since every nucleotide contains all three components, the statement that includes all of them is correct. (In case you see energy-carrying nucleotides like ATP, they still have the same three components plus extra phosphate groups.)