Question

Which of the following steps involved in Calvin cycle is in sequential manner?

• A. Carboxylation – reduction – synthesis – regeneration
• B. Carboxylation – reduction – synthesis – regeneration
• C. Reduction – carboxylation – synthesis – regeneration
• D. Carboxylation – synthesis – regeneration – reduction

Hint:

The correct sequence of steps in the Calvin cycle is carboxylation, reduction, synthesis, and regeneration.

Answer 1

The Correct Option is B

Step 1: Understanding the Calvin cycle steps.
The Calvin cycle involves four key steps: carboxylation (incorporation of CO2), reduction (conversion of 3-PGA to G3P), synthesis (synthesis of glucose), and regeneration (regeneration of RuBP).
Step 2: Analyzing the options.
(A) Carboxylation – reduction – synthesis – regeneration: Incorrect. This sequence does not correctly represent the Calvin cycle.
(B) Carboxylation – reduction – synthesis – regeneration: Correct. This is the correct sequence of steps in the Calvin cycle.
(C) Reduction – carboxylation – synthesis – regeneration: Incorrect. Carboxylation occurs before reduction in the Calvin cycle.
(D) Carboxylation – synthesis – regeneration – reduction: Incorrect. Synthesis occurs after reduction, not before.
Step 3: Conclusion.
The correct answer is (B) Carboxylation – reduction – synthesis – regeneration, as it is the correct sequence of steps in the Calvin cycle.