The parasite Plasmodium, the causative agent of malaria, has a complex life cycle, including both sexual and asexual reproduction. Where does zygote formation (the fusion of two gametes to produce new sporozoites) occur?
1.In the gut of the female mosquito.
2.In the liver of an infected human.
3.In the red blood cells of an infected human.
4.In the liver of the male mosquito.
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The E test is
A. used to measure esculine levels in pasteurized milk. B. a quantitative antibiotic sensitivity test that utilizes plastic strips impregnated with an antibiotic of interest. C. used to quantify levels of IgE antibody in serum samples. D. a rapid serological test used to detect the presence of eastern equine encephalitis virus in cerebrospinal fluid.
Action potentials are propagated in a one-way direction down a neuron plasma membrane because
a. the action potential is of insufficient intensity to stimulate the voltage-gated ion channels behind it. b. the adjacent channels upstream from the action potential are ligand-gated. c. the adjacent channels upstream from the action potential are in their refractory period. d. voltage-gated ion channels are suppressed. e. the adjacent channels upstream from the action potential are at their threshold potential.
Prolactin is a hormone whose molecular structure has remained stable over evolutionary time but whose hormonal role has changed dramatically in different animal species. This is an excellent example of how evolution
A) is responsible for mutation in vertebrates. B) occurs rapidly at the molecular level to keep up with changing environmental influences. C) has stayed within narrow boundaries in regard to regulation of homeostasis. D) can both preserve unity and promote diversity.
You wish to study how a protein binds to DNA, and which specific amino acids are involved. To do this you would create which type of model?
A. mathematical model B. structural model C. temporal model D. mechanistic model E. hierarchical model