BIOLOGY
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA has uracil and ribose, whereas RNA has thymine and deoxyribose.
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RNA has uracil and is double stranded but DNA has thymine and is single stranded.
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DNA has ribose sugar and is double stranded, whereas RNA has deoxyribose sugar and is single stranded.
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RNA has ribose sugar and is single stranded, whereas DNA has deoxyribose sugar and is double stranded.
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Detailed explanation-1: -The deoxyribose sugar of DNA contains one less oxygen-containing hydroxyl group. DNA is a more stable nucleic acid. RNA, on the other hand, contains ribose sugar and is more reactive than DNA. Therefore, DNA is a better genetic material than RNA.
Detailed explanation-2: -Unlike DNA, RNA in biological cells is predominantly a single-stranded molecule. While DNA contains deoxyribose, RNA contains ribose, characterised by the presence of the 2′-hydroxyl group on the pentose ring (Figure 5). This hydroxyl group make RNA less stable than DNA because it is more susceptible to hydrolysis.
Detailed explanation-3: -The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the 2’ carbon of the ribose and its absence on the 2’ carbon of the deoxyribose.
Detailed explanation-4: -Explanation: RNA is different than DNA in that it 1) is single stranded (DNA is double stranded), 2) contains uracil (DNA contains thymine instead), and 3) contains a ribose sugar (DNA contains a deoxyribose sugar). And since both DNA and RNA are made up of nucleotides, they will both contain phosphates.