Question

The enzyme 'Rubisco' in C3 plants is responsible for :
(A) Carboxylation
(B) Oxygenation
(C) Both carboxylation and oxygenation
(D) Reduction​

Answer 1

Answer:

both carboxylation and oxygenation

Explanation:

brcoz it has greater effinity towards both co2 and o2.....this enzyme is present only in c3 olants

Answer 2

Answer:

A) Caroboxylation

Explanation:

Carboxylation is the fixation of CO

2

into a stable organic intermediate. It is the first step in Calvin cycle in C

3

plants. The enzyme responsible for primary carboxylation in C

3

plants is RuBP carboxylase-oxygenase. It stands for Ribulose Bisphosphate Carboxylase-Oxygenase. It is formed of a five-carbon ketose sugar- Ribulose bisphosphate (RuBP). It is the most abundant enzyme on the earth. It is characterized by the fact that its active site can bind to both CO

2

and O

2

, hence the name. RuBisCO has a much greater affinity for CO

2

than for O

2

and the binding is competitive. It is the relative concentration of O

2

and CO

2

that determines which of the two will bind to the enzyme