Reference no: EM133664032
1. What question(s) is (are) they asking in this paper?
2. What does figure 1 show?
A one sentence answer is sufficient.
3. What does figure 2 show?
A one sentence answer is sufficient.
4. Why did the authors perform the experiment leading to the results shown in figure 2?
1 - 2 length answer.
5. Look at Figure 3
What is shown on the X-axis? You will need to read some in the figure legend, and in the text of the paper to find this answer.
6. In figure 3
What is shown by the two different symbols (triangle vs circle)?
7. Why did they use these two different techniques (as represented by the triangle and circle in the previous question)
8.What is shown by the two different lines in figure 3? The details needed to answer this question are described in the figure legend and text.
9. In figure 3, does experiment 1 have higher cell densities that experiment 2? Explain your answer.
10. Why did researchers perform the experiments shown in Figure 3? Why is a growth curve (presented in figure 3) necessary? Give 2 reasons. You will need to read ahead to figure 4 to answer find one of the reasons.
11. In the following questions use the term density to refer to the specific density (mass/volume) of a DNA molecule.
Use the term relative abundance to refer to the relative darkness of a band compared to another.
Figure 4
What does a particular band represent in Figure 4A
12. What does the darkness a given band represent in Figure 4A
13. When analyzing figure 4 further, it may be helpful to look at the model presented in figure 5.
Describe the changes in the banding pattern between 0 and 1 generations.
14. Describe the changes in the banding pattern seen between 1 and 2 (1.9) generations.
15. What does the band at t = 0 generations correspond to in figure 5?
16. What does the band at t = 1 generation correspond to in figure 5?
17. What do the bands at t = 2 generations correspond to figure 5?
18. Predict the frequency of molecules with 2 light strands vs one light one heavy strand at time = 3 generations
19. How do the results in figure 4A validate the model shown in figure 6 (Watson and Crick's model).
20. How is the method of doing science in 1958 similar to that used now? List similarities you observe.