A person's body temperature falls below its normal range. The enzymes in their cells have not been denatured.
Why do many enzyme-controlled reactions become slower?
substrates move faster and collide with active sites less often
substrates move slower and collide with active sites more often
substrates move faster and collide with active sites more often
substrates move slower and collide with active sites less often
78 exam-style questions on Edexcel GCSE Biology 7.3 Homeostasis and thermoregulation, covering 7.3.1 Importance of a constant internal environment, 7.3.2 Importance of homeostasis, 7.3.3a Thermoregulation via the skin and hypothalamus, and 7.3.3b Vasoconstriction and vasodilation in thermoregulation. Each one has a worked solution and a mark scheme showing where the marks go.