Which of the following is NOT an obstacle for expressing cloned eukaryotic genes in Bacteria?
a. Introns must be removed.
b. Sequences may need editing due to codon usage.
c. The host may not be able to perform post-translational modifications.
d. All of the above are obstacles.
Answer: D
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In human blood groups, the fact that an individual can have an AB blood type is an example of ___________
A. incomplete dominance B. incomplete penetrance C. sex-influenced trait D. temperature-sensitive conditional allele E. codominance
When a neuron is at rest
a. the sodium and potassium gated channels are closed. b. the sodium gated channels are closed and the potassium gated channels are open. c. the sodium gated channels are open and the potassium gated channels are closed. d. the sodium and potassium gated channels are open. e. the sodium and potassium gated channels may be open or closed depending upon their location in the nervous system
Many male songbirds are brightly colored. However, the color of the birds is determined by a balance of
A. natural selection against bright colors by predation and sexual selection in favor of bright colors. B. mutations that reduce bright colors and sexual selection in favor of bright colors. C. gene flow that reduces bright colors and natural selection in favor of bright colors. D. mutations that reduce bright colors and gene flow in favor of bright colors. E. natural selection against bright colors by predation and mutations that introduce bright colors.
Which of the following is a prokaryotic microorganism?
A) helminth B) protozoan C) cyanobacterium D) mold