DNA Practice Test DUE 2/19

Griffith worked with what kind of organism?

• pneumonia producing bacteria

• chimpanzees

• bacteriophages

• human genome

The following conclusion belongs to which experiment:

When live harmless bacteria is mixed with heat killed pneumonia causing bacteria, some factor (possible a gene) was transferred from the disease causing bacteria to the harmless bacteria in process known as transformation

• Avery experiment

• Hershey-Chase experiment

• Watson and Crick

• Griffith

The attached image illustrates what scientific process?

• bacteriophage

• radioactive isotopes

• x-ray diffraction

• transformation

What happened when Avery killed all the proteins, lipids, carbohydrates and RNA within a heat killed bacteria?

• transformation

• nothing happened until they killed the bacterial DNA

• nothing happened because they killed all the macromolecules

• bacteriophages formed

Avery used the following to conduct his experiment (built upon Griffith experiment) that studied what bacterial component caused disease when rough and smooth virulent strains were mixed.

• bacteriophages

• radioactive isotopes

• enzymes

• x-ray diffraction

What did the Hershey-Chase study conclude?

• Transformation occurs using protein coats

• Bacteriophages insert their virus into bacteriophages using DNA

• Bacteriophages insert their virus into bacteriophages using protein

• Transformation occurs using macromolecules

What evidence was used in the Hershey-Chase experiment to back-up their claim?

• Sulfur-35 labeled isotopes were found in bacteria after being infected by bacteriophages which showed that DNA was responsible

• Sulfur-35 labeled isotopes were found in bacteria after being infected by bacteriophages which showed that proteins were responsible

• Phosphorus-32 labeled isotopes were found in bacteria after being infected by bacteriophages which showed that DNA was responsible

• Phosphorus-32 labeled isotopes were found in bacteria after being infected by bacteriophages which showed that proteins were responsible

Chargaff's rule

• percentages of Adenine are nearly equal to Cytosine and percentages of Guanine are nearly equal to Thymine but he wasn't sure why

• Adenine binds to Thymine and Cytosine binds to Guanine

• Adenine binds to Guanine and Thymine binds to Cytosine

• percentages of Adenine are nearly equal to Thymine and percentages of Guanine are nearly equal to Cytosine but he wasn't sure why

Rosalind Franklin used what technique to determine the general structure of DNA

• x-rays

• bacteriophages

• enzyme

• x-ray diffraction

Using Rosalind Franklin's DNA images, Watson and Crick used their model to explain

• Avery's experiment

• Hershey-Chase experiment

• Griffith's experiment

• Chargaff's rule