Biologia

Name Group Date

DNA
Answer the questions
1. In Griffith’s bacterial transformation experiments harmless/harmful bacteria change into harmful/harmless bacteria.
2. What happened whenGriffith injected mice with the harmless, R-strain bacteria alone?
3. What did Griffith observe when he injected a mixture of heat-killed, disease-causing bacteria and live harmless bacteria intomice?
4. What did Avery conclude caused transformation?
5. What is inside a bacteriophage? (molecule)
6. What do bacteriophages infect?
7. When a piece of DNA is missing, the geneticinformation is,,,
8. In what way is DNA like a book?
9. One nucleotide found in DNA is formed by…
10. The percentage of adenine in DNA is about equal to the percentage of _____________ and the cytosineis about equal to the percentage of _______________
Percentages of Bases in Five Organisms|
Source of DNA|A|T|G|C|
Human||19.9|29.4||
Chicken|28.8|||21.5|
Bacterium (S. lutea)|13.4||||11. Complete the Figure 12–1 based on Chargaff’s rule.
12. Avery’s experiment worked because bacteriophages and bacteria share a component called…
13. What did Rosalind Franklincontribute to the effort to identify the structure of DNA?
14. During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases:
15. In eukaryotes, DNA is located in___________________

Indicate whether the statement is true or false. If false, change the underlined word or phrase to make the statement true.
_____16. A bacteriophage is larger than a bacterium._____17. The three parts of a DNA nucleotide are the phosphate group, deoxyribose, and the base.
_____18. In eukaryotes, DNA replication proceeds in one direction along the DNA molecule.Complete each statement on the line provided.
19. The outer covering of the virus in Figure 12–2 is made of .
20. The structure labeled X in Figure 12–3 is a(n) .
21. The Watson and Crick model...