Which of the following statements is/are true regarding RNA and DNA?

A. RNA is double stranded while DNA is single stranded.
B. RNA has base uracil in place of thymine in DNA.
C. RNA contains the sugar deoxyribose while DNA contains the sugar ribose.
D. DNA is hereditary material but if it is absent RNA can function as hereditary material.

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Solution

The nucleus of a cell consists of genetic material such as DNA, RNA, chromosomes and genes. DNA is double stranded and contain deoxyribose sugar where as RNA is single stranded and contains ribose sugar. The nitrogenous bases of DNA are: adenine(A), cytosine(C), uracil(U), and guanine(G) and the nitrogenous bases of RNA are: adenine(A), cytosine(C), uracil(U), and guanine(G).
So, the correct answer is option: B and D.

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