CRISPR-Cas9, a Prokaryotic Defense Mechanism, Is a Powerful Emerging Tool

question 19

Multiple Choice

CRISPR-Cas9, a prokaryotic defense mechanism, is a powerful emerging tool in biotechnology for all of the following EXCEPT

• A) allowing the editing of defective genes in eukaryotic cells.
• B) introducing insertions, deletions, or sequence modifications into a given genome with CRISPR-Cas9.
• C) regulating gene expression in bacteria with CRISPRi, in which case Cas9 is no longer active as a nuclease.
• D) marking a defective gene with antibiotic resistance.
• E) disrupting latent HIV provirus in infected cells.

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Definitions:

Electrolyte

A substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water, essential for the operation of batteries.

Armature

In electrical engineering, the rotating coil or coils of a dynamo or electric motor.

Brushes

Components made of conductive material that transmit electrical current between stationary wires and moving parts, often found in motors and generators.

Commutator

A rotary electrical switch in certain types of electric motors and generators that periodically reverses the direction of current flow through the rotor.