Which of the following is not a reason for sampling?
A. The destructive nature of certain tests.
B. The physical impossibility of checking all the items in the population.
C. The adequacy of sample results.
D. All of the above are reasons for sampling
Answer: D. All of the above are reasons for sampling
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A trichome is a bacterial cell with three different photosynthetic pigments.
Answer the following statement true (T) or false (F)
Which statement about Ras proteins is false?
a. They are G proteins. b. They include MAP kinases. c. They are active when bound to GTP. d. They are inactivated when phosphorylated. e. They are activated by tyrosine kinase receptors
Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of _____
A) phosphorylated proteins B) cAMP C) adenylyl cyclase D) activated G proteins
Type S Streptococcus pneumoniae bacterium is lethal and will kill its host. If heat inactivated the S strain dies and becomes nonlethal. Type R Streptococcus pneumoniae is a nonvirulent strain of bacteria. What would occur if one were to inject both the R strain and heat-killed S strains into a host organism such as the mouse?
A. The R strain would be transformed into the virulent S strain and kill the host. B. The R strain would be transformed into the virulent S strain and not affect the host. C. The S strain would be transformed into the nonvirulent R strain and kill the host. D. The S strain would be transformed into the nonvirulent R strain and not affect the host. E. Neither the S nor the R strain would change.