Which of the following nucleotides is not found in DNA? a....

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Key Concepts

DNA

DNA (deoxyribonucleic acid) is the molecule that carries genetic information in most organisms. It is composed of a sugar (deoxyribose), a phosphate backbone, and nitrogenous bases. Key to its function is the specific pairing of these bases, which includes adenine, thymine, cytosine, and guanine.

Nucleotides

Nucleotides are the basic building blocks of nucleic acids like DNA and RNA. Each nucleotide consists of a sugar, a phosphate group, and a nitrogenous base. The specific type of nitrogenous base determines the role of the nucleotide in encoding genetic information.

RNA

RNA (ribonucleic acid) is a nucleic acid similar to DNA but differs in its sugar component (ribose instead of deoxyribose) and in one of its bases. Instead of thymine found in DNA, RNA includes uracil, which plays a crucial role in various biological processes including protein synthesis.

Uracil

Uracil is a nitrogenous base that is unique to RNA, where it replaces thymine, the corresponding base in DNA. This difference is significant in distinguishing the molecular structure and function of RNA from DNA.

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