CELL RESPIRATION
ATP ADENOSINE TRIPHOSPHATE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Uracil
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Thymine
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Cytosine
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Guanine
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Detailed explanation-1: -Nitrogen base not found in DNA is uracil. It is found only in RNA.
Detailed explanation-2: -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-3: -Explanation: Uracil is a nitrogenous base that is only found in single-stranded RNA-it is not found in DNA.
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.
Detailed explanation-5: -Uracil (U) is one of the four nucleotide bases in RNA, with the other three being adenine (A), cytosine (C) and guanine (G). In RNA, uracil pairs with adenine. In a DNA molecule, the nucleotide thymine (T) is used in place of uracil.