Asked by hafiz iskandarani on Jun 13, 2024

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What is the first step in the Calvin cycle?

A) O2 attaches to CO2.
B) O2 attaches to G3P.
C) CO2 attaches to RuBP.
D) CO2 attaches to Rubisco.
E) CO2 attaches to phosphoglycerate.

RuBP

Ribulose bisphosphate, a molecule that plays a crucial role in the carbon fixation phase of photosynthesis.

Calvin Cycle

The Calvin cycle is a set of biochemical redox reactions that take place in the stroma of chloroplasts in photosynthetic organisms. It is a critical part of the process of carbon fixation in photosynthesis.

CO2

Carbon dioxide, a colorless gas with a slightly acidic taste and odor, a byproduct of respiration and an important greenhouse gas in Earth's atmosphere.

  • Familiarize oneself with the significance and workflow of carbon fixation in the context of the Calvin cycle.
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IB
Israt BillahJun 20, 2024
Final Answer :
C
Explanation :
The first step in the Calvin cycle involves carbon dioxide (CO2) attaching to ribulose bisphosphate (RuBP), which is catalyzed by the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco).