When cells stop responding to normal controls over
growth and division they
a. begin to form a tumor.
b. produce a malignancy.
c. start to die.
d. kill surrounding cells.
e. produce scar tissue.
Answer: a
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The centromere is a region in which
A) chromatids remain attached to one another until anaphase. B) metaphase chromosomes become aligned at the metaphase plate. C) chromosomes are grouped during telophase. D) the nucleus is located prior to mitosis. E) new spindle microtubules form at either end.
Unicellular or colonial eukaryotic organisms that are either autotrophic or heterotrophic belong to the Kingdom
A. Plantae. B. Animalia. C. Protista. D. Bacteria.
Unlike bacteria, viruses:
A) are unable to replicate. B) are treated effectively with antibiotics. C) do not produce an immune response. D) do not produce exotoxins or endotoxins.
Some bacteria are resistant to antimicrobials due to the activity of ________, which removes many of them.
A. plasmids B. porins C. efflux pumps D. lipopolysaccharides E. ribosomes