In the Laboratory, Recombinant Plasmids Are Commonly Introduced into Bacterial

question 93

Multiple Choice

In the laboratory, recombinant plasmids are commonly introduced into bacterial cells by:

• A) electrophoresis-a gentle low-voltage gradient draws the DNA into the cell.
• B) infection with a bacteriophage that carries the plasmid.
• C) microinjection.
• D) mixing plasmids with an extract of broken cells.
• E) transformation-heat shock of the cells incubated with plasmid DNA in the presence of CaCl₂.

---

Definitions:

Geographical Locations

Specific places or positions on the Earth's surface identified by coordinates of latitude and longitude.

Anatomical Feature

Physical characteristics or structures of the body or organs identified in anatomy.

Sodium Ion Gates

Protein channels in cell membranes that open or close in response to stimuli, allowing the flow of sodium ions into or out of the cell, crucial in the generation of action potentials.

Nodes of Ranvier

Gaps in the myelin sheath of nerve fibers, which facilitate rapid conduction of nerve impulses along axons by allowing the impulses to jump from one node to the next.