IB Biology HL C2.1.6 Hl Transmembrane Vs Intracellular Receptors Questions
Practise IB Biology HL 2.1.6 by applying transmembrane vs. intracellular receptors concepts to exam questions.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Explain that peptide hormones bind transmembrane receptors because they do not enter target cells.
- Relate peptide-hormone receptor binding to second messengers, reaction cascades and altered enzyme activity.
- Explain that steroid hormones cross the plasma membrane, bind intracellular receptors and regulate gene transcription.
IB Biology HL C2.1.6 Hl Transmembrane Vs Intracellular Receptors Questions question 1
[Maximum number: 3]
Distinguish between the mode of action of steroid hormones and peptide hormones.
| Steroid hormones | Peptide hormones |
|---|---|
| enter the cell/pass through the plasma membrane | do not enter the cell/pass through the plasma membrane |
| bind to receptor in cytoplasm | bind to receptor on plasma membrane surface |
| act directly on DNA | act through second messenger/cAMP |
| directly affect gene transcription | influence enzyme activity/protein kinase |
All question bank results loaded