Enzymes: Biological Catalysts
Students will study the role of enzymes as biological catalysts, investigating factors that affect their activity and their importance in metabolic pathways.
About This Topic
Students will study the role of enzymes as biological catalysts, investigating factors that affect their activity and their importance in metabolic pathways.
Key Questions
- Explain how the Na⁺/K⁺-ATPase uses the energy of ATP hydrolysis to establish and maintain electrochemical gradients across the plasma membrane, and analyse why maintaining these gradients is essential for nerve impulse generation and nutrient uptake.
- Compare primary active transport with secondary active transport, using the sodium-glucose symporter in the small intestinal epithelium as an example to explain how the Na⁺ gradient generated by primary transport drives secondary co-transport.
- Evaluate the evidence from experiments using ouabain to inhibit the Na⁺/K⁺-ATPase, explaining how these data support the electrochemical gradient as the driving force for glucose absorption in intestinal epithelial cells.
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