GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is made up of a single strand of nucleotides.
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It contains the sugar deoxyribose.
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It leaves the nucleus to translate protein.
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It contains the nitrogen base uracil.
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Detailed explanation-1: -DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. The only difference between ribose and deoxyribose is that ribose has one more-OH group than deoxyribose, which has-H attached to the second (2’) carbon in the ring. DNA is a double-stranded molecule, while RNA is a singlestranded molecule.
Detailed explanation-2: -There are two differences that distinguish DNA from RNA: (a) RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose (a type of ribose that lacks one oxygen atom), and (b) RNA has the nucleobase uracil while DNA contains thymine.
Detailed explanation-3: -⇒ Thymine is present in DNA but not in RNA.
Detailed explanation-4: -Answer and Explanation: The correct answer is d. Deoxyribose sugar. The deoxyribose sugar is found in the DNA, but it is not found in the RNA.
Detailed explanation-5: -Unlike DNA, RNA is usually single-stranded. Additionally, RNA contains ribose sugars rather than deoxyribose sugars, which makes RNA more unstable and more prone to degradation.