An advantage of using reverse transcriptase to prepare a gene for cloning is that
A) reverse transcriptase is more efficient than RNA polymerase.
B) the resulting DNA strand will lack exons.
C) reverse transcriptase is more efficient than DNA polymerase.
D) the resulting DNA strand will lack introns.
Answer: D
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Some animal viruses may enter a ____ stage in which the virus remains in the cell in inactive form
a. latent b. virulent c. temperate d. transformation e. lytic
Which statement is true?
a. The ratio of carbon dioxide produced to oxygen consumed is greater than one in healthy adults. b. The partial pressure of oxygen in the lungs is greatest just before exhalation. c. The partial pressure of carbon dioxide is greatest in venous blood. d. Partial pressures are the measurement of Hg displacement in the lungs.
What structure is responsible for the exchange of gas in leaves?
a. Aerenchyme b. Propagule c. Lenticels d. Stomata
You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered snapdragon. All of the F1 are pink. What can you say about the alleles for the parental traits?
A. Red and white show incomplete dominance. B. Pink is dominant, whereas red and white are recessive. C. Both red ad white are recessive. D. Red is dominant.