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- 1. Multiple Choice
Griffith investigated R and S strains with mice. What did he conclude about the S strain and the R strain in the trial with heat-killed S strain and living R strain?
The mouse lived as the R strain provided protection from the nonliving S strain.
The mouse died as the R strain did not provide protection from the nonliving S strain.
The mouse lived as the R strain was not affected by a transforming agent released from the nonliving S strain.
The mouse died as the R strain was affected by a transforming agent released from the nonliving S strain
- 2. Multiple Choice
What was the difference between the R and S strains in the Griffith experiment?
R strain was pathogenic while S strain was not pathogenic
R strain was not pathogenic while S strain was pathogenic
R strain had antibodies against the S strain
S strain had antibodies against the R strain
- 3. Multiple Choice
What technology did Rosalind Franklin use to produce the image of the DNA molecule used by Watson & Crick?
X-ray crystallography
Electron microscope
Light microscope
NMR
- 4. Multiple Choice
What feature did Hershey and Chase use to differentiate between the protein and nucleic acid in their experiment?
Proteins have phosphorus and Nucleic acids have sulfur
Proteins have sulfur and Nucleic acids have phosphorus
Proteins are single stranded and Nucleic acids are double stranded
Proteins are double stranded and Nucleic acids are single stranded
- 5. Multiple Choice
Based on the conservative model, what are the predicted results from two rounds of replications in the Meselson-Stahl experiment where the initial strands are 15N and the new strands are 14N?
The first round involves a hybrid (14N-15N) band, the second round involves a light (14N) band and a hybrid (14N-15N) band
The first round involves a hybrid (14N-15N) band, the second round involves a hybrid (14N-15N) band
The first round involves a heavy (15N) band and a light (14N) band, the second round involves a hybrid (14N-15N) band.
The first round involves a heavy (15N) band and a light (14N) band, the second round involves a heavy (15N) band and a light (14N).
- 6. Multiple Choice
Based on the semiconservative model, what are the predicted results from two rounds of replications in the Meselson-Stahl experiment where the initial strands are 15N and the new strands are 14N?
The first round involves a hybrid (14N-15N) band, the second round involves a light (14N) band and a hybrid (14N-15N) band
The first round involves a hybrid (14N-15N) band, the second round involves a hybrid (14N-15N) band
The first round involves a heavy (15N) band and a light (14N) band, the second round involves a hybrid (14N-15N) band.
The first round involves a heavy (15N) band and a light (14N) band, the second round involves a heavy (15N) band and a light (14N).
- 7. Multiple Choice
Based on the dispersive model, what are the predicted results from two rounds of replications in the Meselson-Stahl experiment where the initial strands are 15N and the new strands are 14N?
The first round involves a hybrid (14N-15N) band, the second round involves a light (14N) band and a hybrid (14N-15N) band
The first round involves a hybrid (14N-15N) band, the second round involves a hybrid (14N-15N) band
The first round involves a heavy (15N) band and a light (14N) band, the second round involves a hybrid (14N-15N) band.
The first round involves a heavy (15N) band and a light (14N) band, the second round involves a heavy (15N) band and a light (14N).
- 8. Multiple Choice
Which of the following did Watson & Crick determine from the image provided by Rosalind Franklin of DNA?
approximate width of the DNA molecule
length of one turn of the DNA molecule
number of nucleotides in the DNA molecule
nitrogenous bases order in the DNA molecule
- 9. Multiple Choice
What information did Chargaff provide to Watson and Crick to aid in their understanding of base pairing?
adenine pairs with thymine and guanine pairs with cytosine.
adenine pairs with guanine and thymine pairs with cytosine.
adenine pairs with cytosine and guanine pairs with thymine.
adenine pairs with adenine and thymine pairs with thymine.
- 10. Multiple Choice
Which scientist(s) conclusively proved that DNA was the genetic material for organisms?
Chargaff
Watson & Crick (+ Rosalind Franklin)
Griffith
Hershey & Chase
Meselson & Stahl
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