A complete viral particle is called a ____
a. capsule
b. virion
c. capsid
d. viroid
e. prophage
ANSWER: b
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A bacteriophage that lacks its proteinaceous capsid structure is also called a viroid
Indicate whether the statement is true or false.
The result obtained in Jacob and Monod's merodiploid analysis that suggested the lacO region acts in cis to regulate the lac operon was:
A. a nonfunctional lacI mutant is rescued by a wild-type lacI allele. B. a nonfunctional lacI mutant cannot be rescued by a wild-type lacI allele. C. a nonfunctional lacO mutant is rescued by a wild-type lacO allele. D. a nonfunctional lacO mutant cannot be rescued by a wild-type lacO allele.
Which respiratory disease is caused when bacterial enzymes destroy the alveolar walls and the surface area of the lungs declines?
a. Emphysema b. Tuberculosis c. Asthma d. Apnea e. Pneumonia
Proto-oncogenes
A. code for proteins that promote the cell cycle. B. promote apoptosis. C. are considered "loss-of-function" mutations. D. become tumor suppressor genes when mutated. E. code for angiogenic growth factors.