1 DNA: The Genetic Material (continued)
Student Edition, pp. 326–332
Reading Essentials,
pp. 127–131
Complete the table below about geneticists and their discoveries.
Scientist
Discovery
Year
Frederick Griffith
Oswald Avery
Alfred Hershey and
Martha Chase
James Watson and
Francis Crick
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GET IT?
Explain how Avery discovered the transforming factor.
GET IT? Explain why it is important that new viruses were produced
in the bacteria.
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1 DNA: The Genetic Material (continued)
Organize the characteristics of nucleotides by filling in the
graphic organizer below.
Characteristics of Nucleotides
All nucleotides have
a five-carbon
a negative
one of four
In DNA it is
In DNA they are
and in RNA it is
and in RNA they are
GET IT? Explain why Chargaff’s data was an important clue for putting
together the structure of DNA.
Synthesize and rephrase how a DNA strand that is 200 million bases
long can fit inside a cell.
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Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use.
Create a memory device to help you remember how the nitrogenous
bases are always paired.
1 DNA: The Genetic Material (continued)
REVIEW IT !
1. MAINIDEA Summarize the experiments of Griffith and Avery that indicated that DNA
is the genetic material.
2. Describe the data used by Watson and Crick to determine the structure of DNA.
Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use.
3. Draw and label a segment of DNA showing its helix and complementary base pairing.
4. Compare and contrast the structure of prokaryotic and eukaryotic chromosomes.
5. Describe two characteristics that DNA needs to fulfill its role as a genetic material.
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1 DNA: The Genetic Material (continued)
6. Evaluate Hershey and Chase’s decision to use radioactive phosphorus and sulfur for
their experiments. Could they have used carbon or oxygen instead? Why or why not?
Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use.
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