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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

1. Why did Watson believe that DNA would be a two-chain?
(a) Crick had found 2 chains in previous research
(b) Picture showed 2 chains
(c) Things in biology come in pairs
(d) Pauling's model was wrong

2. Where had Watson gotten the structures for the bases?
(a) From Rosy's photographs
(b) From Watson's own research into bacteria
(c) From Pauling's research
(d) Out of a chemistry book

3. What did Watson continue to believe the problem was?
(a) Backbone
(b) Bases
(c) Acid level
(d) Chain number

4. What was Watson continually thinking about as he went to films in regards to progress on DNA model?
(a) Acids
(b) Number of chains
(c) Bases
(d) Building materials

5. What happened when King's lab began comparing their experimental results to the double helix structure?
(a) They refuted the model
(b) They debated it's accuracy
(c) They found a major flaw
(d) They supported the model

6. Who has developed a structure of DNA in chapter twenty-one?
(a) Rosy
(b) Crick
(c) Linus Pauling
(d) Watson

7. What shape was Watson trying to prove TMV was?
(a) Hexical
(b) Cylindrical
(c) Helical
(d) Octagonal

8. How did Crick feel about Watson's work on bacteria reproduction?
(a) Uninterested
(b) Surprised
(c) Supportive
(d) Interested

9. What was the fundamental flaw in Linus Pauling's model of DNA?
(a) He could not identify the number of helixes
(b) He relayed that there were four helixes
(c) The phosphate molecules were ionized
(d) The phosphate molecules were not ionized

10. Who identified the major fundamental flaw in Linus Pauling's model of DNA?
(a) Sir Lawrence
(b) Pauling's father
(c) Rosy
(d) Watson

11. What had Maurice been doing in secret in regards to Rosy?
(a) Copying her notes
(b) Copying her photographs
(c) Documenting her insubordination
(d) Documenting her mistakes and reporting them to supervisors

12. What event diffused the tension and heat between Rosy and Watson?
(a) Watson walking out of the lab
(b) Maurice entering the lab
(c) Rosy assaulting Watson
(d) Rosy tearing up Pauling's work

13. Which two components of DNA did Chargaff find had the same number of molecules?
(a) guanine and adenine
(b) guanine and thymine
(c) cytosine and thymine
(d) adenine and thymine

14. How did Maurice answer when asked if he minded Watson and Crick working on the structure of DNA?
(a) He said they should all work together
(b) No, but slowly
(c) No, immediately
(d) Yes, immediately

15. How did Watson feel about Rosy's reaction to the new model?
(a) Awed
(b) Angered
(c) Surprised
(d) Rejected

Short Answer Questions

1. When Watson constructed models of the bases what was the same about a pair?

2. What was wrong with Maurice at the meeting in Paris?

3. How did Watson spend the time while he waited for the machine shop to construct the necessary parts?

4. Which of the following terms best describes how the English scientists felt about the United States refusing to allow Pauling to travel to London to speak at the conference?

5. Who told Pauling about the double helix structure?

(see the answer keys)

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