Which of the following types of cloning vector can carry the largest amount of foreign DNA?
A. Bacteriophage
B. Bacterial artificial chromosome
C. Plasmid
D. Cosmid
Answer: B
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Type S Streptococcus pneumoniae bacterium is lethal and will kill its host. If heat inactivated the S strain becomes nonlethal. Type R Streptococcous 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 S strain would be transformed into the nonvirulent R strain and kill the host. B. The R strain would be transformed into the virulent S strain and kill the host. C. The S strain would be transformed into the nonvirulent R strain and not affect the host. D. The R strain would be transformed into the virulent S strain and not affect the host. E. Neither the S nor the R strain would change.
Nephrotic syndrome is characterized by ____
a. large amounts of protein in the urine b. the inability to thermoregulate c. the inability to urinate d. large amounts of urea in the urine e. increased urine production
You are a resource manager of a large eutrophic lake. After stopping the source of nutrients from entering the lake, what further steps could you do to improve the water quality?
a. introduce phytoplankton-consuming fish. b. introduce freshwater sponges into the lake. c. introduce aquatic plants into the habitat. d. introduce carnivorous fish into the lake.
Generally, it is not possible to determine whether nondisjunction failed to occur in oogenesis or spermatogenesis. However, it is possible to assert that XYY results from nondisjunction during
A) oogenesis. B) spermatogenesis. C) mitosis. D) cytokinesis.