Interferons____
a. make holes through bacterial cell membranes
b. make holes through bacterial cell walls
c. prevent entry of viruses into cells
d. block the replication of viruses within cells
e. bind iron and make it unavailable for bacteria and viruses
ANSWER: c
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A mature collection of species, called a ____ ____ , makes up the final stage of succession
Fill in the blank with the appropriate word.
The most common sexually transmitted bacterial pathogen and a major cause of pelvic inflammatory disease (PID) is:
a. Rickettsia rickettsii. b. Chlamydia trachomatis. c. Klebsiella granulomatis. d. Coxiella burnetii.
Agarose gel electrophoresis separates DNA molecules according to their ____
a. charge b. length c. sequence d. percentage of GC base pairs e. structure
Bernoulli's principle
What will be an ideal response?