High School

The enzyme rubisco (ribulose bisphosphate carboxylase oxygenase) catalyzes competing reactions using which competing substrates?

A. ATP and NADPH
B. CO2 and O2
C. PEP and HCO3^-
D. Glucose and 3-PGA
E. RuBP and ATP

Answer :

Final answer:

The enzyme rubisco catalyzes competing reactions using the substrates CO2 and O2.

Explanation:

The enzyme rubisco catalyzes competing reactions using the competing substrates CO2 and O2. Rubisco is involved in the process of photosynthesis, where it helps to convert CO2 into sugar. However, it can also react with O2 instead of CO2, leading to a wasteful process called photorespiration.

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