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

Biology & Microbiology

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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

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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

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology