12. The Calvin Cycle A. is catabolic B. is cxergonic C. occurs in the matrix D.

Question

12. The Calvin Cycle A. is catabolic B. is cxergonic C. occurs in the matrix D. reverses glycolysis E. None of the other answers are true 13. Which of the following statements is representative of the second law of thermodynamics? A. Conversion of energy from one form to another is always accompanied by gain in free energy. B. Heat represents a form of energy that can be C. Without an input of encrgy, organisms would rend toward decreasing entropy D. Cells require a constant input of energy to maintain their high level of organization. E. Every energy transformation by a cell decreases the entropy of the universe. used by most organisms to do work. 14. In most excrgonic reactions, the reactants capable of intcracting to form products typically must first overcome a thermodynamic barrier known as the A. entropy of the reaction. B. energy conservation of the reaction. C. chemical equilibrium of the reaction. D. activation energy of the reaction. 5. The ? G or a particular enzyme-catalyzed raction is-20 kcal mol. If the amount ofenzyme in the reaction is doubled, what will be the AG for the new reaction? A. -40 kcal/mol B.-20 keal/mol C.o kcal/mol D.+20 kcal/mol E. +4o kcal/mol

Explanation / Answer

12) The reactions that occur in plants that fixes carbon from carbondioxide to three carbon sugars are known as Calvin's cycle. It us a part of photosynthetic reactions and it occurs in the stroma of chloroplasts. Therefore, it is an anabolic and endergonic reaction. Calvin cycle is also known as reverse glycolysis since the reactants and products are just opposite in these cycles. So, the answer for this question is option D.

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