A vaccine against HIV proteins made by a genetically-engineered vaccinia virus that has infected a eukaryotic cell line is a(n)
A) conjugated vaccine.
B) subunit vaccine.
C) nucleic acid vaccine.
D) inactivated whole-agent vaccine.
E) toxoid vaccine.
B
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DNA vaccines work by
A. stimulating production of antibodies against DNA. B. stimulating interferon production. C. inactivating the host DNA. D. having the cell use the introduced DNA to make the microbial protein antigen.
Why did the average body weight of sociable weavers move in a stabilizing direction? a. Predators killed birds of medium body weight
b. Meager food supply selects against all birds equally. c. Predators randomly killed the birds. d. Meager food supply selects against birds of high body weight. e. Predators killed birds of high body weight.
The statement, "Energy is neither created nor destroyed," is a statement of
A) the first law of thermodynamics. B) the second law of thermodynamics. C) entropy. D) enthalpy. E) an early theory of energy that has now been proven false.
What is the function of a carboxysome?
A) store carbon B) acts as a magnetic compass to guide bacteria C) fix carbon D) protect against oxygen radicals E) store energy