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Question

The difference between the two nucleic acids DNA and RNA can be characterized by the presence of .......... in the latter.

A
Adenine purine and loss of one oxygen atom
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B
Phosphodiester bonds and 53 chain orientation
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C
Uracil pyrimidine
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D
Thymine pyrimidine and ribose sugar
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Solution

The correct option is A Uracil pyrimidine
RNA is ribonucleic acid made up of ribonucleotides. DNA is deoxyribonucleic acid made up of deoxyribonucleotides. The ribonucleotides are made up of the ribose sugar, phosphoric acid, and nitrogenous bases. The deoxyribonucleotides are made up of 2' deoxyribose sugar, phosphoric acid, and nitrogenous bases.
The nitrogenous bases which are a component of ribonucleotides are adenine, guanine, cytosine, and uracil. The nitrogenous bases which are the component of deoxyribonucleotides are adenine, guanine, cytosine, and thymine.
So, the correct answer is option C.

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