New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    Which of these statements are accurate regarding the

    molecular structures of DNA and RNA? Statements:  1. DNA is a doublestranded molecule, while RNA is typically singlestranded.  2. RNA contains the sugar ribose, while DNA contains the sugar deoxyribose.  3. Both DNA and RNA utilize the nitrogenous base thymine.
    A Statements 1 and 2 only Correct Answer Incorrect Answer
    B All statements are correct Correct Answer Incorrect Answer
    C Statements 2 and 3 only Correct Answer Incorrect Answer
    D Statements 1 and 3 only Correct Answer Incorrect Answer

    Solution

    DNA is indeed a doublestranded molecule, contrasting with the generally singlestranded RNA. DNA incorporates deoxyribose sugar, whereas RNA contains ribose sugar. Unlike DNA, which uses thymine, RNA uses uracil instead of thymine.

    Practice Next