OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Watson and Crick
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Rosalind Franklin
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Fredrick Griffeth
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Erwin Chargaff
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Detailed explanation-1: -The biochemist Erwin Chargaff had found that while the amount of DNA and of its four types of bases–the purine bases adenine (A) and guanine (G), and the pyrimidine bases cytosine (C) and thymine(T)–varied widely from species to species, A and T always appeared in ratios of one-to-one, as did G and C.
Detailed explanation-2: -Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal. This parity is obvious in the final DNA structure.
Detailed explanation-3: -So, Chargaff first isolated the four different nitrogenous bases of DNA referred to as A, G, T, and C, using paper chromatography. He then created new solutions containing each of his isolated samples and observed them using UV spectrophotometry.