IMMUNOGLOBULINS
CLASSICAL ALTERNATE AND LECTIN PATHWAYS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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NADH dehydrogenase
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RuBisCO
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ATP Synthase
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None of the above
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Detailed explanation-1: -The enzyme responsible for primary carboxylation in C3 plants is RuBisCO. It stands for Ribulose Bisphosphate Carboxylase-Oxygenase. It is formed of a five-carbon ketose sugar-Ribulose bisphosphate (RuBP). It is characterized by the fact that its active site can bind to both CO2 and O2, hence the name.
Detailed explanation-2: -Carbon fixation is the first reaction of the Calvin Cycle. One carbon dioxide (1C) molecule binds to 1, 5-bisphosphate (RuBP) (5C). This reaction is catalyzed by the enzyme ribulose bisphosphate carboxylase.
Detailed explanation-3: -The missing ingredient needed to uncouple Rubisco and RuBP was found in the intact plant with a separate protein, called Rubisco activase (3). This enzyme acts on Rubisco and allows release of the bound RuBP so that the site can bind the activator CO2 and Mg2+.