Home » The micronutrient which activates many enzymes and is necessary for photosynthesis is Nutrition MCQs The micronutrient which activates many enzymes and is necessary for photosynthesis is May 5, 2022 16 Views Q. The micronutrient which activates many enzymes and is necessary for photosynthesis isA. ironB. zinc monoxideC. nitric acidD. citric acidAnswer: iron