Consider the following statements regarding the sugar moieties present in nucleic acids: (A) The sugar moiety in RNA is -D-ribose. (B) The sugar moiety in DNA is -D-2-deoxyribose. (C) In the sugar of DNA, the -OH group at C-3 is replaced by -H. (D) Both sugars exist in the pyranose ring form in nucleic acids. Choose the correct statements from the options given below:

Step-by-step solution

Let us evaluate each statement: (A) True. The sugar present in RNA is -D-ribose. (B) True. The sugar present in DNA is -D-2-deoxyribose. (C) False. In DNA, the deoxygenation occurs at the C-2 position, meaning the -OH group at C-2 is replaced by -H, not at C-3. (D) False. In nucleic acids, both ribose and 2-deoxyribose exist in the 5-membered furanose ring form, not the 6-membered pyranose form. Therefore, only statements (A) and (B) are correct. Answer: (A) and (B) only