Soru
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
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4.3
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Usta · 5 yıl öğretmeni
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The correct answer is d) a base + a sugar + a phosphate.A nucleotide is the basic building block of nucleic acids, such as DNA and RNA. It is composed of three components: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).2. A sugar: This is a five-carbon sugar molecule, either deoxyribose (in DNA) or ribose (in RNA).3. A phosphate group: This is a phosphorus atom bonded to four oxygen atoms, and it provides the negative charge to the nucleotide.So, the complete composition of a nucleotide is a nitrogenous base, a sugar, and a phosphate group.