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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Thymine
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Uracil
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Cytosine
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Adenine
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Detailed explanation-1: -Explanation: RNA is AUGC and DNA is ATGC. Hence, the base U (Uracil) is present in RNA but not in DNA.
Detailed explanation-2: -One of the most important differences between DNA and RNA apart from the sugar molecule is the nitrogenous base Uracil, which is seen only in RNA. Instead of Uracil, DNA has Thymine, while the other three nitrogenous bases (Adenine, Guanine, Cytosine) are the same in both RNA and DNA.
Detailed explanation-3: -Thymine is present in DNA but absent in RNA, while Uracil is present in RNA but absent in DNA. Cytosine is present in both DNA and RNA.
Detailed explanation-4: -Uracil is one of four nitrogenous bases found in the RNA molecule: uracil and cytosine (derived from pyrimidine) and adenine and guanine (derived from purine). Deoxyribonucleic acid (DNA) also contains each of these nitrogenous bases, except that thymine is substituted for uracil.
Detailed explanation-5: -One of the four nucleobases in DNA’s nucleic acid, represented by the letters G-C-A-T, is thymine. This is so that the DNA repair enzymes may recognize thymine rather than uracil. Because thymine has a higher resistance to photochemical mutation and makes the genetic code more durable, DNA uses it instead of uracil.