Introducing a gene in a liposome to carry DNA across the plasma membrane is a(n) ________ gene therapy.
A) in situ
B) ex vivo
C) in vivo
D) ex hubris
E)
et al
C) in vivo
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A gene that undergoes rho-dependent termination has a mutation in the rut site. How will this influence transcriptional activity?
A. Transcription will terminate normally as Rho termiantion relies on the rut site to enhance termination; it is not essential for termination B. Transcription will stop immediately because RNA polymerase will sense there is a mutation C. Transcription will continue until another termination sequence, either Rho dependent or independent is reached D. There will be no transcription initiation
The insecticide parathion is detoxified in the body by the enzyme paraoxonase, which has two alleles (Q and R). A person with the genotype Q/Q living in an area of high organophosphate use would be expected to _____
1.rapidly metabolize parathion 2.be completely unable to metabolize parathion 3.be extremely sensitive to parathion poisoning 4.metabolize parathion more rapidly in infancy than during adulthood
Which of the following phyla is unusual, as it is composed of a single species?
a. Gnetophtya b. Anthophyta c. Ginkgophyta d. Coniferophyta e. Cycadophyta
All of the following are true statements about the lymphatic system EXCEPT that
A) the lymphatic system transports carbohydrates from the small intestine to the blood. B) the lymphatic system returns fluids to the bloodstream. C) lymphatic vessels resemble veins because they have valves. D) the lymphatic system helps defend the body against disease.