Unity and Diversity A.2 Nucleic Acids (id: 9f1d68d37)

本题目来源于试卷: Unity and Diversity A.2 Nucleic Acids，类别为 IB生物学

[单选题]
The diagram below shows the structure based on the tetranucleotide hypothet q+h53 (;kxnp9dexvtsisl hr1xzsed/ b8+21,x 4jowemn*2gkio proposed by Levene that DNA was made up of equal amounts of adenine, guanine, cytosine and thymine. This hypothesis was a problem of induction, because it was based on a limited set of data. Subsequent evidence and data revealed a more complex and accurate understanding of the structure, leading to the falsification of the 21se2 zrigl8/4+,km o*1 ondjxweb hxinitial hypothesis.

A. Erwin Chargaff
B. Rosalind Franklin
C. Alfred Hershey
D. James Watson


参考答案:  A


本题详细解析:
Choice A is correct because Chargaff used papy-azwy *r0 elq 5w-xt-er chromatography to show that the proportions of adenine (A) and thymine (T) are the same, as are the proportions of guanr y-lt- ew0za5-y*w xqine (G) and cytosine (C). There are not equal proportions of A, T, G and C.

Franklin (Choice B) and Watson (Choice D) are credited for their contributions to the overall structure of DNA structure. Hershey (Choice C), along with Chase, is famous for his research which provided evidence for the idea that DNA, rather than protein, carries the genetic code.

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