2
Biology Name ______________________________
DNA Worksheet
Period ___________
Use information from Chapter 12 of your textbook, and information from the DNA timeline found on the website under “links” to help you complete this outline.
I. DNA Discovery
A. Scientists who contributed to the idea that DNA carries the genetic code. Describe each of the following scientist experiment and what conclusion their experiment lead to in the understanding of the role of DNA.
1. Griffith –
2. Avery, McCarty and MacLeod –
3. Hershey and Chase –
II. DNA Structure
A. Scientists who contributed to an understanding of DNA structure and function. Describe how each scientist contributed to the discovery of the structure of DNA.
1. Franklin –
2. Watson and Crick –
3. Chargaff –
B. Function of DNA is
C. Parts of a DNA nucleotide are
D. Describe the shape of a DNA molecule.
III. DNA Replication
A. Describe the replication of a DNA molecule.
B. Explain why DNA replication is necessary for the continuation of life.
Biology 137 Name ______________________________
Chapter 7
“History” Worksheet
Use the following key to answer questions #1-11. Match the statement with the scientist’s experiment to which it corresponds. Answers may be used more than once. Not all answers have to be used.
1. ______ Determined that adenine bonds to thymine and
cytosine bonds to guanine
2. ______ Built 3-D models of the DNA molecule
3. ______ Took x-rays of DNA strands
4. ______ Proved that the cause of pneumonia was not a chemical
poison released by bacteria
5. ______ Concluded that DNA carries genetic information
6. ______ First to demonstrate the process of transformation
7. ______ First to discover the identity of the “transforming”
factor
8. ______ Tried to determine which parts of a virus infect the
inside of bacteria
9. ______ Used others x-ray photos to determine the structure of
DNA
10. ______ Observed that the amount of adenine equals the
amount of thymine, and that the amount of guanine
equals the amount of cytosine in any sample of DNA
11. ______ Determined that the protein core of a virus is not what
enters and infects bacteria
a. Griffith
b. Avery
c. Hershey and Chase
d. Chargaff
e. Watson and Crick
f. Franklin and Wilkins
12. Several scientists received the Nobel Prize for their contributions to the discovery of DNA structure. One who worked in this area did not receive the Nobel Prize. Who were they, and why weren’t they awarded the prize along with their colleagues?
The Hershey-Chase
Blender Experiment
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