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Chemistry paper 1 a level

How did people find it
Pretty ok overall, but had to rush the multiple choice and didn't have as much time as I would have liked in the mid section 3-4 mark questions
More concretely, I really didn't like the last question (6marks)
E+S-> ES->EP->E+P if I remember correctly
I put:
E=enzyme
S=substrate
P=protein
ES=Enzyme-Substrate (bonded) -(probably wrong)
EP=Enzyme-Protein (bonded) -(probably wrong)
for the first straight line of the graph from ROR 0 to ROR max I put E+S forms ES in a first order reaction.
then by ROR max, all ES has been converted to EP.
- this is where the rate of proverbial **** hitting the fan increases -
for when ROR plateaus and becomes 0 order I put it was EP->E+P because of um... reasons : P
(different reaction different order, so I called it zero because of the graph)

-That's about the extent of my probably dumb logic, can anyone who finds a problem with my solution, or better, knows how to solve it please leave a reply? thanks : )

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