Question

(a) When blood clots, an enzyme converts a soluble plasma protein into an insoluble

plasma protein.


Use the information in the graph to suggest the optimum temperature for this enzyme.

(b) Explain why blood takes longer to clot at 20°C than it does at 30°C.


(c) Use your knowledge of enzymes to explain why blood is slow to clot at 45°C.

Answer 1

Answer:

(a)-- at 37

(b)---- coz of (further) away from optimum temp

2 low (kinetic) energy ,

3few collision, less movement

enzyme substrate complexes

(c) 1denatured

2active site

3changes shape or deformed

Answer 2

Answer:

a) 37 °C [1]

b) at 20 °C the enzyme and substrate molecules have less kinetic energy than at 30°C. [1] The slower they move the fewer collisions they have and therefore fewer enzyme substrate complexes are formed. [1]

c)  at 45°C the enzymes will be denatured. Meaning the shape of the active site has been lost. [1] And the substrate will no longer fir into it, and so blood is slow to clot at 45°C. [1]

Explanation:

a) The quicker the blood takes to clot, the faster the enzyme was working. The optimum temperature is the temperature at which the enzyme will work the fastest.

b) See file attached

c) -