Question

If ribophase biphosphate carboxylase were absent from an autotroph, what would it NOT be able to fix?

1) Oxygen
2) Carbon dioxide
3) Glucose
4) Water

Answer 1

If ribophase biphosphate carboxylase were absent from an autotroph, it would not be able to fix carbon dioxide.

Step-by-step explanation:

If ribophase biphosphate carboxylase were absent from an autotroph, it would not be able to fix carbon dioxide. Ribulose bisphosphate carboxylase (RuBisCO) catalyzes the addition of CO₂ to ribulose bisphosphate (RuBP) in the process of carbon fixation.

Without RuBisCO, autotrophs would not be able to convert carbon dioxide into organic molecules like glucose. Therefore, option 2) Carbon dioxide would not be fixed.