1.
Researchers try to design experiments so that an experimental treatment shows the effect that one, and only one, condition or agent has on the phenomenon being studied. Examine Figure 11.1 and decide which treatments in the transformation study acted as experimental treatments, and which acted as controls. Write a general statement explaining the role of control treatments in experimental design.
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2.
Explain the relationship between the analysis of "inborn errors of metabolism" and the one-gene, one-enzyme hypothesis.
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3.
Throughout this chapter, DNA is referred to as an "information-storage molecule." Explain how the base sequence of DNA stores information. What is this information used for?
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4.
Scientists say that a phenomenon is a "black box" if they can describe it and study its effects, but don’t yet know the underlying mechanism that causes it. In what sense was the gene a black box before experiments confirmed that DNA is the hereditary material?
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