Why is the RuBisCo enzyme more appropriately | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) $RuBisCo$ is called $RuBP$ Carboxylase-Oxygenase because it exhibits dual catalytic activity,meaning it can bind to both $CO_2$ and $O_2$. Its fun

Vedclass · Accepted Answer

It can bind to both $CO_2$ and $O_2$ depending on their relative concentrations.

Vedclass · Answer

(C) $RuBisCo$ is called $RuBP$ Carboxylase-Oxygenase because it exhibits dual catalytic activity,meaning it can bind to both $CO_2$ and $O_2$. Its function depends on the relative concentration of these two gases:$(i)$ When $CO_2$ concentration is high relative to $O_2$,the enzyme acts as a carboxylase,facilitating the fixation of $CO_2$ with $RuBP$ to initiate the $C_3$ cycle (Calvin cycle),leading to the production of glucose.$(ii)$ When $O_2$ concentration is high relative to $CO_2$,the enzyme acts as an oxygenase,initiating photorespiration ($C_2$ cycle) by binding $RuBP$ with $O_2$ to form phosphoglycolate,which is an energy-consuming process.$(iii)$ In $C_4$ plants,the enzyme is protected from oxygenase activity because they possess a mechanism to concentrate $CO_2$ around the $RuBisCo$ enzyme,ensuring it functions primarily as a carboxylase.

Why is the $RuBisCo$ enzyme more appropriately called $RuBP$ Carboxylase-Oxygenase and what important role does it play in photosynthesis?

Similar Questions

The stroma of the chloroplast in higher plants contains:

Which of the following was used during the research of the Calvin cycle?

Do reactions of photosynthesis called as 'Dark Reaction' need light? Explain.

The enzyme responsible for the carboxylation reaction ($CO_2$ fixation) in $C_3$ plants is:

The path of carbon in photosynthesis was determined by using:

Vedclass Test Series

Exam Paper Generator

Online Exam Module