What are the three factors of the epidemiological triangle?
A) vaccine use, disinfectant use, and hand-washing policy
B) time from exposure to symptoms, access to transportation, quality of hospitals
C) pathogen type, host health, and geographic overlap
D) environmental factors, etiological agent, and host factors
E) survivability, length of acute phase, cultural factors
Answer: D
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Regulatory transcription factors _____
A) influence the binding of sigma factor to DNA B) influence the assembly of the basal transcription complex C) influence the degree of unwinding of DNA at the promoter D) open the two strands of DNA so that RNA polymerase can begin transcription
Animal cells typically achieve cytokinesis by:
A. binary fission. B. forming a cell plate across the middle of the cell. C. forming a cleavage furrow that pinches the cell into two. D. chromosome condensation. E. chromosome elongation.
Resting potential arises from the distribution of charged ____ and small ions inside and outside of a neuron
a. pumps b. channels c. organelles d. proteins e. membranes
Why is active transport important in cell functions?
What will be an ideal response?