If a protein to be overexpressed is toxic to the expression host, it is best to select an expression vector that
A) is compatible with a binary vector able to be regulated.
B) is inducible.
C) has a relatively low copy number per cell.
D) prevents folding of the overexpressed protein into its toxic form.
Answer: B
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For mechanisms of sex determination, which of the following is incorrectly paired?
A. X-Y, cow B. X-O, grasshopper C. ZZ-ZW, bluebird D. 1n-2n, pea plant E. high temperature-low temperature, alligator
Coral bleaching is a result of: a. the calcareous skeleton begins to breakdown
b. extended periods of run-off. c. pesticides from coastal developments. d. corals expelling their zooxanthellae.
Which type of fish is likely to produce the smallest number of progeny from each mating?
A. An oviparous species B. An ovoviparous species C. A viviparous species Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about strategies for development? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What caused the ‘Dust bowl' region in the United States in the 1930s?
a. deforestation b. acid rain c. overgrazing on grasslands d. plowing of grasslands exposed topsoil to wind e. drought in undisturbed grasslands