Your name (in print):
What is your lab section?
Are you a graduate or undergrad?
BIOL 572, Monday, 9/11/06, Quiz
1: On Watson and Crick’s 1953 Nature article
1. DNA is an abbreviation as you may know. What was it abbreviated from in
the article? What is it abbreviated from in today’s textbooks?
2. In the second paragraph, the authors mentioned that a structure for nucleic
acid had been proposed by Corey and Pauling. What are two major
differences between the Corey and Pauling’ DNA structure model and the one
proposed by Watson and Crick?
3. The authors mentioned that they believe that the material which gives X-ray
diagram is the salt, not the free acid. What is that salt they were talking about?
4. The fourth paragraph describes the essential feature of the DNA model as it is
known presently. Had the authors ever used the terms such as “double helix”,
“double helical structure”, or even “staircase” at all in this paragraph or
elsewhere in the text?
5. What had been described in the Furberg’s model No.1 according to your
reading or guess?
6. In the paragraph 11, the authors suggested that it is impossible that the
structure of a nucleic acid with ribose instead of the deoxyribose forms a
double-stranded structure. Is it true or false based your knowledge? Explain.
7. Paraphrased from the last three paragraph is “the specific paring we have
postulated immediately suggests a possible coping mechanism for the genetic
material”. What is that coping mechanism the author referred to?
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8. In the middle of the text, the authors mentioned something like tautemeric
forms and, the enol and keto configurations. Please tell a little bit about what
are meant by these terms if you can?
9. How many pages does the article have?
10. What is the title of the article?
Each question above, answered correctly, will be rewarded 10 points.
For a bonus of 40 points, why do not you try the following question?
What is the most significant discovery that Drs. Watson and Crick made according to
your understanding of the article?
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