Which of the following procedures would be used to introduce DNA into a single mouse cell?
A. Southern blotting
B. electroporation
C. gene gun
D. microinjection
E. protoplast fusion
Answer: D
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If a solution contains fewer hydrogen ions than hydroxide ions, the solution can be described as ________.
a. acidic b. basic c. neutral d. both acidic and basic
Which form of selection is most likely to contribute to speciation over time?
a. stabilizing selection b. directional selection c. diversifying selection d. sexual selection
Proteins whose conformations change when they are bound to an effector molecule are called
A) enzymes. B) allosteric proteins. C) regulatory proteins. D) activator proteins. E) inhibitory proteins.
Which element can only be converted by bacteria into a form that is available to plants and animals?
a) Carbon b) Oxygen c) Nitrogen d) Hydrogen