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What are the main components of a nucleotide?
A
A nitrogenous base, a phosphate group, and a (pentose sugar)
B
A phosphate group, a (hexose sugar), and a lipid
C
A nitrogenous base, an amino acid, and a (pentose sugar)
D
A nitrogenous base, a phosphate group, and a (hexose sugar)
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1
Identify the basic structure of a nucleotide, which is a building block of nucleic acids like DNA and RNA.
Understand that a nucleotide is composed of three main components: a nitrogenous base, a phosphate group, and a sugar.
Recognize the types of nitrogenous bases, which include purines (adenine and guanine) and pyrimidines (cytosine, thymine, and uracil).
Determine the type of sugar present in a nucleotide. In DNA, the sugar is deoxyribose, a pentose sugar, while in RNA, it is ribose, also a pentose sugar.
Conclude that the correct components of a nucleotide are a nitrogenous base, a phosphate group, and a pentose sugar, distinguishing it from other options that include hexose sugars or lipids.