Four primary factors affect the size of a population of a particular species. Which of these is not one of those major factors?
a. deaths
b. births
c. mitigation
d. emigration
e. immigration
C
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Which of the following is most responsible for the increasing challenge of protist infections?
A. Protists are not always recognized by the host immune response. B. Protists are becoming completely resistant to the drugs used to control them. C. Protists are mutating and gaining virulence factors. D. The size of the susceptible population is growing as the number of patients with immunocompromising conditions is increasing.
Which of the following is NOT a reason why eukaryotic gene regulation is more complicated than
prokaryotic gene regulation?
a. Eukaryotic DNA is sequestered in the nucleus. b. Eukaryotic DNA is complexed with histones. c. Eukaryotic transcription is completed before translation begins. d. Multicellular eukaryotic organisms produce many different types of cells. e. Eukaryotic regulatory sequences are scattered throughout the genome.
Nuclear envelopes form during which phase of mitosis?
A) Anaphase B) Prophase C) Metaphase D) Telophase
Oncogenic mutations in Ras, Src and ErbB2 genes commonly seen in tumors typically involve __________
a) Increased tyrosine phosphorylation of these 3 proto-oncogenes b) Disruption of the protein's on/off control c) Nonsense mutations that result in little or no protein being expressed d) Changes in protein shape that result in completely different protein binding partners