A temperate phage is defined as
a. being in an active lytic cycle.
b. having mutations that reduce its virulence.
c. being a particle outside a host cell.
d. being capable of lysogeny.
e. having mutations that prevent it from integrating into the bacterial genome.
Ans: d
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Metamorphosis is:
A. changing of one body form to another within a species, such as the change from an aquatic tadpole to a terrestrial frog B. an intermediate condition, such as length of legs in mice between longer legs of some mice and shorter legs in others, a condition caused by Hox genes C. the developmental changing of a scale to a feather D. the evolutionary transition from fishes to amphibians E. none of the choices provided
Innate immune mechanisms _____
a. are fast acting b. take about a week to 10 days to come into full effect c. are very specific for their targets d. are tailored to only a few specific pathogens e. are produced by genetic recombinations
Years before Schwann’s pronouncement that a cell
has a life of its own even as a component of a multicellular organism, the cell nucleus had been discovered by a. Robert Hooke. b. Robert Brown. c. Theodor Schwann. d. Rudolf Virchow. e. Anton van Leeuwenhoek.
Gram-negative bacteria do not have peptidoglycan in their cell walls.
Answer the following statement true (T) or false (F)