Mechanism of hormones action — NEET Biology Questions

Practice 10 questions on Mechanism of hormones action from Chemical coordination and integration (NCERT Class 11, Chapter 19). Free samples below — get all 10 in the app.

10 Questions Chemical coordination and integration Class 11

Sample Questions — Mechanism of hormones action

Try 5 questions below from Mechanism of hormones action. Get all 10 in the MedicNEET app.

MCQ
What is the name of the complex formed when a hormone binds to its receptor?
  • A. Hormone-receptor complex
  • B. Signal-transduction unit
  • C. Hormone-ion complex
  • D. Receptor-hormone assembly
✅ Correct Answer: A
- The initial interaction between a hormone and receptor forms a hormone-receptor complex.
MCQ
Assertion (A): Steroid hormones interact with intracellular receptors. Reason (R): They directly regulate gene expression through the hormone-receptor complex.
  • A. Both A and R are true, and R is the correct explanation
  • B. Both A and R are true, but R is not the correct explanation
  • C. A is true, R is false
  • D. A is false, R is true
✅ Correct Answer: A
- Steroid and thyroid hormones bind intracellularly, influencing DNA-level gene regulation.
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MCQ
Which hormones mainly regulate physiological effects through genome interaction?
  • A. Protein hormones
  • B. Steroid hormones
  • C. Peptide hormones
  • D. Catecholamines
✅ Correct Answer: B
- Steroid hormones enter cells and act via nuclear receptors influencing gene expression.
MCQ
Which class of hormone receptors regulates gene expression?
  • A. Intracellular receptors
  • B. Membrane-bound receptors
  • C. Transport proteins
  • D. Ion channels
✅ Correct Answer: A
- Steroid and iodothyronine hormones use intracellular receptors to regulate gene expression.
MCQ
Which of the following is a correct pair based on receptor interaction?
  • A. Epinephrine – Nuclear receptor
  • B. Steroid – Membrane-bound receptor
  • C. Thyroid hormone – Acts on cytoplasm
  • D. Peptide hormone – Second messenger
✅ Correct Answer: D
- Peptide hormones bind to membrane receptors → activate second messengers like cAMP. Others are false pairs.

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