| active site |
the part of an enzyme or antibody where the chemical reaction occurs
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| active placebo |
a placebo used in experimental tests of a drug that has noticeable side effects; "an active placebo mimics the side effects of the experimental drug"
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| active transport |
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
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| activity |
any specific behavior; "they avoided all recreational activity" action: the state of being active; "his sphere of activity"; "he is out of action" bodily process: an organic process that takes place in the body; "respiratory activity" (chemistry) the capacity of a substance to take part in a chemical reaction; "catalytic activity" natural process: a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity" activeness: the trait of being active; moving or acting rapidly and energetically; "the level of activity declines with age"
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| act |
perform an action, or work out or perform (an action); "think before you act"; "We must move quickly"; "The governor should act on the new energy bill"; "The nanny acted quickly by grabbing the toddler and covering him with a wet towel" behave in a certain manner; show a certain behavior; conduct or comport oneself; "You should act like an adult"; "Don't behave like a fool"; "What makes her do this way?"; "The dog acts ferocious, but he is really afraid of people" play a role or part; "Gielgud played Hamlet"; "She wants to act Lady Macbeth, but she is too young for the role"; "She played the servant to her husband's master" discharge one's duties; "She acts as the chair"; "In what capacity are you acting?" pretend to have certain qualities or state of mind; "He acted the idiot"; "She plays deaf when the news are bad" a legal document codifying the result of deliberations of a committee or society or legislative body be suitable for theatrical performance; "This scene acts well" something that people do or cause to happen work: have an effect or outcome; often the one desired or expected; "The voting process doesn't work as well as people thought"; "How does your idea work in practice?"; "This method doesn't work"; "The breaks of my new car act quickly"; "The medicine works only if you take it with a lot of water" a subdivision of a play or opera or ballet be engaged in an activity, often for no particular purpose other than pleasure a short theatrical performance that is part of a longer program; "he did his act three times every evening"; "she had a catchy little routine"; "it was one of the best numbers he ever did" dissemble: behave unnaturally or affectedly; "She's just acting" a manifestation of insincerity; "he put on quite an act for her benefit" perform on a stage or theater; "She acts in this play"; "He acted in `Julius Caesar'"; "I played in `A Christmas Carol'"
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