____ can phagocytose about 100 bacteria during their life spans, and release antiviral agents
a. Natural killer cells
b. Plasma cells
c. Macrophages
d. T helper cells
e. Cytotoxic T cells
c
Biology & Microbiology
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Siderophores from some pathogens remove iron from the host protein(s)
A) lactoferrin. B) transferrin. C) both lactoferrin and transferrin. D) cytochromes.
Biology & Microbiology
Small circles of DNA that occur in bacteria in addition to the main circular chromosomal DNA molecule are called
____.
a. transformants b. plastids c. plasmids d. plasmitrons e. bacteriophages
Biology & Microbiology
Which of the following is NOT subject to polygenic inheritance?
a. human height b. human skin color c. flower color in snapdragons d. seed color in wheat e. ear length in corn
Biology & Microbiology
Nearly half of the 4,000 placental mammal species are:
a. rodents b. bats c. herbivores d. predators e. hoofed animals
Biology & Microbiology