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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 20.

Multiple Choice Questions

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

2. Who offered Watson a job at Cal-Tech?
(a) Max Delbruck
(b) Chargaff
(c) Pauling
(d) Sir Lawrence

3. What could be used to rule out some false starts of potential DNA structures?
(a) Nucleotides
(b) Binding agents
(c) 3-dimensional figures of DNA
(d) X-ray pictures of DNA crystals

4. Which of the following is the best term for chains of nucleotides?
(a) Multinucleotide chains
(b) Patterned nucleotide chains
(c) Seminucleotide chains
(d) Polynucleotide chains

5. Where did Watson see Chargaff for the second time but they did not speak?
(a) International Biochemical Congress in Paris
(b) London at a conference with Pauling
(c) Cambridge at the lab
(d) In Stockholm at a conference on crystallography

Short Answer Questions

1. How much faster was Watson able to take pictures with the new X-ray tube?

2. About how long did Crick think it would take he and Watson to narrow down the number of possible DNA structures?

3. Where did Watson and Crick meet Chargaff?

4. What did Watson study after told to stop working on the model of DNA?

5. What shape was Watson trying to prove TMV was?

(see the answer key)

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