Name _______________________________________ Date ______________ Period _______
Chapter 8 Concept Review
B I O L O G Y
Directions: Answer the following questions using your notes and textbook
1. _______________ experimented with the bacteria that cause pneumonia.
2. S form or bacteria killed with __________ mice unaffected
3. Griffith concluded that a transforming material passed from __________ S bacteria to
___________ R bacteria, making them deadly.
4. Avery identifies __________ as the transforming principle
5. Added enzymes to break down DNA- transformation ________________ to occur.
Concluded _________ was transforming factor
6. Hershey and Chase confirm that DNA is the ________________ material
7. Studied viruses that infect bacteria (________________________)
8. Concluded phages ________ had entered bacteria but ________________ had not. Genetic
material must be DNA
9. DNA is composed of four types of _____________________
10. DNA is long polymer composed of ___________________ called nucleotides.
11. Each ____________________ has three parts
a. ___________________ group
b. Ring-shaped sugar called _____________________
c. _________________-containing base
12. In 1950 Erwin Chargaff changed thinking by analyzing DNA of several different organisms.
Found amount of adenine equals thymine and amount of cytosine equals amount of guanine.
____ = ____ and ____ = ____ (called ____________________ rules)
13. Rosalind Franklin and Maurice Wilkins used ___ -_________ crystallography and suggested
DNA _________________ shape
14. In 1953 _________________ and ________________ published their DNA modelin a paper
in the journal Nature
15. ______________________ always pair in the same way
