CELL STRUCTURES AND FUNCTION
BIO MOLECULES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]


10%


20%


30%


80%

Detailed explanation1: Since adenine is 20%, then thymine is 20% as well. The total of both is 40%. From 100 remains 60% which is divided equally between guanine and cytosine, so each is 30%.
Detailed explanation2: Answer: There would be 20% Cytosine. Adenine (30%) = Thymine (30%) Guanine (20%) = Cytosine (20%)
Detailed explanation3: If you have 20% of adenine than you have 20% of thymine, because the amount of adenine and thymine is equal. 20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%.
Detailed explanation4: Since cytosine and guanine are always present in equal numbers, the percentage of guanine molecule is 30%.
Detailed explanation5: Hence, the sum of the purine residues equals the sum of the pyrimidine residues; i.e. A + G = T + C. Here, [A] = 30%, therefore, % of [T] is also 30%. Thus, [G]+[C] = 10060 = 40%.