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(genetic biology)

Grammar: verb
verb forms: activates, activated, activating
Definition:
~ to switch or make active a gene or cell

~ to start or speed up a biochemical reaction

~ to start a biological process.

Compare inhibit or repress.
Example:
1. Activation of a gene allows the gene to be expressed at a particular time.

2. Acetylcholine is released from a nerve cell and diffuses across a neuromuscular junction to activate a muscle cell on the other side.
Related Word: activation (noun)
Related Compound: activation energy