Enzymes – activation energy

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1. 1 2016 Phase II Biomolecules
   Which of the following describes the given graph correctly?
   
   A Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme B Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme C Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme D Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme.
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