Viral proteins can damage host cells by which process?
a. producing endotoxins
b. preventing transcription of viral nucleic acids
c. increasing the rate of fermentation within the host
d. causing a decline in coordination and increased irritability
e. overwhelming the host cell with a large number of viruses
e
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Which of the following is a common misconception regarding evolution?
a. Evolution attempts to explain the origins of life on Earth. b. Evolution is still occurring in modern times. c. The theory of evolution is backed by scientific evidence. d. The theory of evolution is well accepted among the scientific community.
Two bird species compete in the forest for the same seeds. If ? = 0.75 and ? = 0.25, then (assuming the same carrying capacity for both)
A) the rate of seed consumption is the same for both species. B) the environment can supply both species since the sum of competition coefficients equals 1. C) species 1 "wins" and will outcompete species 2. D) species 2 "wins" and will outcompete species 1.
A promoter at the beginning of a genetic operon is a(n)
A. enzyme that facilitates the transcription of DNA B. site where DNA replication begins C. site on DNA where RNA polymerase binds D. site on RNA where translation starts E. gene that codes for RNA polymerase
Which statement is not true about T cell subclass differentiation?
A) T cell subclass differentiation is caused by the release of cytokines that is influenced by the antigen's nature and the amount present. B) Regardless of which T helper cell subclass develops during an immune response, the humoral response is not impacted. C) Particular combinations of cytokines will favor the development of some T cell subclasses over others. D) Each subclass will include both effector and memory cells. E) Which specific T helper cell subclass that develops may impact the progression and outcome of an infectious disease.