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Why would the concentration of catechol oxidase be increased?

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In test tube 1 was: 5ml water, 0.5ml potato extract, 0.5ml PTU, 1ml catechol oxidase
In test tube 2 was: 5ml water, 0.5ml potato extract, 0.5ml PTU, 0.5ml water, 0.5ml catechol oxidase
In test tube 3 was: 5ml water, 0.5ml potato extract, 1ml water, 0.5ml catechol oxidase
Why was catechol oxidase increased in test tube 1?Also, why are test tubes 1 and 2 control control variables?
asked 12 years ago in Biology by anonymous
edited 12 years ago by chronodev

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