THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA’s sugar is ribose; RNA’s sugar is deoxyribose
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DNA is single stranded; RNA is double stranded
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DNA contains thymine; RNA contains uracil
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DNA is in cytoplasm; RNA is in nucleus
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Detailed explanation-1: -Explanation: RNA contains uracil, while DNA contains thymine. All of the other statements are true. Note that DNA is usually double-stranded and RNA is usually single-stranded, but both can exist in the opposite configuration under certain conditions.
Detailed explanation-2: -RNA contains uracil, while DNA contains thymine. RNA is double stranded, while DNA is single stranded. DNA contains phosphates, while RNA does not. The 5-C sugar is exactly the same in both RNA and DNA.
Detailed explanation-3: -Correct answer: Explanation: DNA and RNA share many characteristics. They are both composed of nucleotide monomers and are read in the 5’-to-3’ direction. They also share the same complementary base pairs, except RNA uses uracil in place of thymine; both contain adenine.
Detailed explanation-4: -Because thymine has a higher resistance to photochemical mutation and makes the genetic code more durable, DNA uses it instead of uracil. This is required to store all the data required for life to function. The chemical breakdown of cytosine results in the easy production of uracil in DNA.