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Assertion (A): Steroid hormones act more slowly than adrenaline but their effects last longer.
Reason (R): They work by changing gene transcription rather than by modifying existing proteins.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both are true and the reason accounts for both halves: making new protein takes time, whereas phosphorylating an enzyme already present is nearly immediate, and the newly made protein persists after the signal has gone.

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