Answer:
A. A pairs with U
Explanation:
In DNA, the nitrogenous bases are A, T, G, and C. In RNA, the nitrogenous bases are A, U, G, and C.
A pairs with U in RNA because it requires less energy to use uracil over thymine.
Hope that helps.
The base pairing in RNA is different from DNA as A pairs with U.
DNA exists abbreviation of deoxyribonucleic acid, an organic chemical of complex molecular structure that exists found in all prokaryotic and eukaryotic cells and numerous viruses. DNA codes genetic information for the information of inherited traits. Each strand of a DNA molecule exists comprised of a long chain of monomer nucleotides. The nucleotides of DNA consist of a deoxyribose sugar molecule to which stands connected a phosphate group and one of four nitrogenous bases.
Hence, The base pairing in RNA is different from DNA as A pairs with U.
Therefore, the (A) option exists as the correct answer.
To learn more about DNA,refer here : https://brainly.com/question/16099437
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