INTRODUCTION TO MICROSCOPY CELL BIOLOGY
DIFFERENTIATED CELL
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If 40% of the DNA molecule is Adenine, what percent is thymine?
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20%
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80%
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10%
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40%
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Explanation:
Detailed explanation-1: -In a DNA sample, the percentage of adenine is 40% and percentage of thymine is 60%. What is your inference? According to Chargaff’s rule, Concentration of adenine=concentration of thymine. therefore if [A]=40% then the [T] will also be 40%.
Detailed explanation-2: -Since cytosine and guanine are present in equal amounts, we can simply divide their sum by 2. The final composition is 22% adenine, 22% thymine, 28% cytosine, and 28% guanine.
Detailed explanation-3: -According to Chargaff’s rule. Guanine pairs with cytosine. It guanine is 40% then cytosine will also be 40%. Similarly, Aenine pairs with thymihne, if guanine is 40%, the remaining 60% will be Adenine.
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