Currently malaria ____
a. kills about two million people each year in the U.S.
b. has no known treatment
c. can be prevented with a vaccination
d. can be prevented with the drug quinidine
e. is a temporary infection
ANSWER: d
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When phytochromes mediate plant responses to shading they could cause:
A. leaves to fall off B. leaves to turn towards the light C. no influence on leaves D. extension of shade leaves into the light E. leaves to turn brown
Explain why lactose intolerance is considered a variation in gene expression rather than a genetic disorder
What will be an ideal response?
Because a steroid hormone is nonpolar, it ____
a. must be transported across a cell membrane with a receptor molecule b. is equipped with specific receptor molecules c. can dissolve in blood d. can diffuse directly across a cell membrane e. is an inhibiting hormone
Sketch the main elements of an inducible operon, such as the lactose operon, and explain the functions
of the operator and promoter regions. What will be an ideal response?