NEET
Biology
Principle Of Inheritance And Variation
Question Bank
Critical Thinking
question_answer
In his experiments on the chemistry of DNA, Chargaff estimated the base composition of human sperms and found that Adenine constituted 31% and Guanine 19%. The quantity of Cytosine in the DNA of human somatic cell is likely to be [BHU 1991]
A)31%
B)19%
C)38%
D)68%
Correct Answer:
B
Solution :
19%; because 'G' is always attached with 'C' (G ºC), thus percentage of C will always be equal to G.