Which of the following diseases may be reduced by improved public sanitation measures?
A. malaria
B. HIV
C. cholera
D. chickenpox
E. rabies
Answer: C
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Two proteins that control synapse formation in response to environmental stimuli in early childhood and that when abnormal might lie behind autism are
A) collagen and elastin. B) insulin and glucagon. C) neurexin and neuroligin. D) fibrin and fibrinogen.
The requirements for patenting of an invention involving DNA in the U.S. are that it should be
A) new, useful, and not obvious to an expert in the field. B) obvious, and no one should have previously been able to accomplish it. C) helpful and affordable. D) new, useful, and predicted by experts in the field.
A cross of two Kerry horses always produces Kerry. A cross of a Kerry with a Dexter horse produces
1/2 and 1/2. Crosses of two Dexters produce two Dexters for every Kerry. Explain. What will be an ideal response?
A researcher wants to develop a test that will distinguish charophytes and land plants from green algae. Which of the following chemicals would be the best subject for such an assay?
A) chlorophylla photosynthetic pigment B) carotenoidsa class of accessory photosynthetic pigments C) starcha food storage material D) glycolate oxidasean peroxisomal enzyme that is associated with photorespiration E) flavonoidsa class of phenolic compounds that is often associated with chemical signaling