IB Biology HL B2.1.4 Membrane Protein Functions Question Bank
Practise IB Biology HL B2.1.4 by extending membrane-protein diagrams into topology, anchoring, transport and cellular function.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Analyse integral and peripheral protein positions and link them to transport, receptors and signalling.
- Use membrane diagrams to distinguish active pumps, facilitated channels and surface-associated proteins.
B2.1.4—Integral and peripheral proteins question 1
[Maximum number: 4]
Oxygen is needed to complete aerobic cell respiration.
Outline four different functions of membrane proteins.
a. receptor/binding site for hormone/neurotransmitter
b. cell-to-cell communication / cell recognition
c. channels «for passive transport» / facilitated diffusion
d. pumps / active transport
e. cell adhesion
f. «immobilized» enzymes/enzymes embedded in the membrane
g. electron transport / electron carriers
4 max
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