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NEETZoologyMolecular Basis of Inheritance

What is the difference between RNA and DNA?

Options

  1. ARNA has guanine in place of thymine
  2. BRNA has an additional –OH group present at 2'-position in the ribose
  3. CDNA has an additional –OH group present at 2'-position in the ribose
  4. DDNA has uracil in place of thymine

Correct answer

B. RNA has an additional –OH group present at 2'-position in the ribose

Step-by-step solution

In RNA, every nucleotide residue has an additional –OH group present at 2' -position in the ribose. Also, in RNA the uracil is found at the place of thymine (5-methyl uracil, another chemical name for thymine). DNA as an acidic substance present in nucleus was first identified by Friedrich Meischer in 1869. He named it ‘Nuclein’. However, due to technical limitations in isolating such a long polymer intact, the elucidation of structure of DNA remained elusive for a very long period of time. It was only in 1953 that

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