How were nitroglycerine's therapeutic benefits discovered?
a) the fact that dynamite factory workers with heart conditions had less angina on days that they worked
b) by reading the literature
c) through careful drug testing
d) the fact that dynamite factory workers with heart conditions had more angina on days that they worked
e) by prayer
Ans: a) the fact that dynamite factory workers with heart conditions had less angina on days that they worked
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Indicate whether the statement is true or false.
The program BLAST would be best used for what purpose?
A. Determining what restriction sites are present in a fragment of DNA B. Identifying a promoter sequence C. Identifying splice donor and acceptor sites D. Identify related sequences to a given DNA sequence in the Genbank database
Which component of a negative feedback mechanism is responsible for producing the effect that
counteracts the original environmental change away from homeostasis?
a. sensor b. response c. effector d. stimulus e. integrator
For the relative proportions of alleles and genotypes in successive generations to stay the same, which condition must
be met for the population? a. There can be no natural selection. b. A population must not be very large. c. There can only be mating between relatives. d. A population can only have some migration. e. A population can have only occasional matings.