THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A sample of DNA is analyzed, the percentage of Adenine is found to be 27% What is the percentage of Guanine?
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27%
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54%
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23%
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46%
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Explanation:
Detailed explanation-1: -The percentage for both Guanine and Cytosine stands as 27% as the base percentages for each.
Detailed explanation-2: -Answer and Explanation: The correct answer: A DNA molecule with 24% guanine would have 26% adenine.
Detailed explanation-3: -So, the correct option is ‘27%’.
Detailed explanation-4: -If A = 25%, we can conclude that T = 25%. The remaining 50% (100-25-25) of the DNA is composed out of guanine and cytosine (G+C=50%). Since G = C, therefore G=25% as well as C=25%.
Detailed explanation-5: -Therefore, given 27 percent of thymine, there is also 27 percent of adenine. Thus, the amount of guanine and cytosine would have 100-27(2)= 46, which follows that there is 23 percent of cytosine (46/2).
There is 1 question to complete.