객관식
What is the primary organic product of the Calvin cycle in photosynthesis?
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3. Acids and Bases
Organic Chemistry Reactions
객관식
Which two chemical reactions are catalyzed by the enzyme RuBisCO in the Calvin cycle?
A
Phosphorylation and dephosphorylation of
B
Carboxylation and oxygenation of
C
Hydrogenation and dehydrogenation of
D
Isomerization and epimerization of
검증된 단계별 안내1
Understand the role of RuBisCO: RuBisCO is an enzyme that plays a crucial role in the Calvin cycle, which is part of the photosynthetic process in plants. It catalyzes reactions involving ribulose-1,5-bisphosphate.
Identify the reactions catalyzed by RuBisCO: RuBisCO is known for catalyzing two specific reactions - carboxylation and oxygenation. These reactions are essential for the fixation of carbon dioxide and the photorespiration process.
Carboxylation process: In the Calvin cycle, RuBisCO catalyzes the carboxylation of ribulose-1,5-bisphosphate by adding a carbon dioxide molecule, forming two molecules of 3-phosphoglycerate. This is a key step in carbon fixation.
Oxygenation process: RuBisCO also catalyzes the oxygenation of ribulose-1,5-bisphosphate, where oxygen is added instead of carbon dioxide, leading to the formation of one molecule of 3-phosphoglycerate and one molecule of 2-phosphoglycolate. This process is part of photorespiration.
Differentiate from other reactions: The other options provided, such as phosphorylation, hydrogenation, and isomerization, are not catalyzed by RuBisCO in the Calvin cycle. Focus on the specific role of RuBisCO in carboxylation and oxygenation.
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