AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA REPLICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a molecule of DNA is made up of 40% Adenine, what percentage is Thymine?
A
20%
B
40%
C
10%
D
80%
Explanation: 

Detailed explanation-1: -Therefore, Guanine would be 20% and total of G+C = 40% and hence A+T would be 60% that is 30% each. Hence, option C is correct answer.

Detailed explanation-2: -According to Chargaff’s rule, Concentration of adenine=concentration of thymine. therefore if [A]=40% then the [T] will also be 40%.

Detailed explanation-3: -Answer: There would be 20% Cytosine.

Detailed explanation-4: -The final composition is 22% adenine, 22% thymine, 28% cytosine, and 28% guanine. Uracil is only found in RNA.

There is 1 question to complete.