<span>In the lock-and-key model of enzyme action, the "Substrate" fits into the "Active site" of the enzyme
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Both MDMA ( or Ecstasy) and PCP have recently been reclassified as recreational hallucinogenic drugs. <span>The recreational drug is a psychoactive drug that induces an altered state of consciousness. It is used for pleasure because it modifies the perceptions and feelings of the one who uses it.</span>
All of the above are correct answers
Answer:
The most abundant noble gas in atmosphere is Argon
Humans because that’s what it is
