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13 March, 14:14

What is a similarity between DNA and RNA

a) Both are polymers of nucleotides

b) Both are composed of antiparallel strands

c) Both contain adenine, cytosine and thymine

d) Both contain ribose sugar

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Answers (1)
  1. 13 March, 16:10
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    Let's use process of elimination to answer this question!

    D is wrong, and we know this because of the names of DNA and RNA. The D in DNA stands for deoxyribose, and the R in RNA stands for ribose. These are the types of sugars in each nucleic acid. Therefore, they don't both contain a ribose sugar.

    C is wrong, and this is because RNA does not contain thymine, but uracil instead.

    B is wrong, and we know this because we know that RNA is composed of only one strand, and therefore it is not composed of multiple stands (plural).

    Therefore, A must be right. We can confirm this, because we know that polymers are large molecules consisting of repeated subunits. DNA and RNA are both polymers consisting of nucleotides.
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