What is the composition of nucleotide? a a base + a phosphate b a sugar + a phosphate C abase+a sugar d abase+a sugar + phosphate

The correct answer is d) a base + a sugar + a phosphate.<br /><br />A nucleotide is the basic building block of nucleic acids, such as DNA and RNA. It is composed of three components:<br /><br />1. A nitrogenous base: This is the variable part of the nucleotide, and there are five different types of bases - adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U).<br /><br />2. A sugar: This is a five-carbon sugar molecule, either deoxyribose (in DNA) or ribose (in RNA).<br /><br />3. A phosphate group: This is a phosphorus atom bonded to four oxygen atoms, and it provides the negative charge to the nucleotide.<br /><br />So, the complete composition of a nucleotide is a nitrogenous base, a sugar, and a phosphate group.