MDCAT Biology MCQ #152

In hot and dry conditions, the concentration of CO2 in leaves drops. Which catalytic activity does the enzyme RuBisCO exhibit under these specific circumstances?

MDCAT Biology MCQ #152

  1. Question 1

    Q1. In hot and dry conditions, the concentration of CO2 in leaves drops. Which catalytic activity does the enzyme RuBisCO exhibit under these specific circumstances?

    • A) Carboxylase
    • B) Reductase
    • C) Oxygenase
    • D) Dehydrogenase

    Answer: Oxygenase

    Explanation: RuBisCO acts as an oxygenase when CO2 levels are low and O2 is high; carboxylase activity is its standard role in photosynthesis.