Which one of the following is found in both messenger RNA and DNA of a mammalian cell?
Correct answer: D. Sugar - phosphate backbone
- A. Double helical structure
- B. Ribose sugar
- C. Thymine
- D. Sugar - phosphate backbone
Explanation
As we can see that the double-helical structure and the nitrogenous base Thymine are exclusive to DNA, while RNA solely posses the Ribose sugar. However, the one thing common between the two genetic materials is the Sugar Phosphate Backbone. A sugar-phosphate backbone (alternating grey-dark grey) joins together the nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups and defines the directionality of the molecule.
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About Ribonucleic Acid (RNA)
Ribonucleic acid is generally a single-stranded nucleic acid containing ribose and uracil instead of thymine. Coverage includes mRNA, tRNA and rRNA, complementary base pairing, transcription and translation, and the differences between RNA and DNA in structure, location and biological function.
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