What experiment led to an understanding by Kornberg that DNA acted as a template for DNA synthesis?
What will be an ideal response?
They noticed that DNA synthesis in bacterial cell extracts required all four dNTPs. This implied that the DNA added to the assay was acting as a template rather than a primer. They then tested DNAs that varied in base composition and found that the composition of the added DNA was the same as that for the DNA synthesized in the reaction.
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A potential consequence of continued human population growth could be which of the following?
a. Humans change from exponential to logistic growth patterns. b. Carrying capacity of the planet will increase. c. Life expectancy decreases as resources become limited. d. Life expectancy increases as resource become more abundant.
Phase ________ trials occur when a drug is tested on small groups of healthy individuals to determine the proper dose and route of administration
A) I B) II C) III D) IV E) V
In the United States, parathion is the most widely used member of a class of ____.
a. organophosphate herbicides
b. organophosphate insecticides
c. chlorophosphate fungicides
d. chlorophosphate herbicides
e. chlorophosphate insecticides
Assume that an organism has a diploid chromosome number of 14. There would be ________ chromosomes in a tetraploid
A) 56 B) 104 C) 14 D) 28 E) 42