Concept explainers
Interpretation:
The reason for the requirement of a larger proton gradient in the chloroplast than in the mitochondria is to be determined.
Concept introduction:
There are a series of
Photosynthesis occurs in the presence of light, and water is converted to oxygen by oxidation and
The
The coupling of the reaction depends on the proton gradient across the membrane in both the mitochondria and chloroplast.
In the mitochondria, there is another type of gradient generation, called electrochemical gradient, which also contributes to the total potential energy production.
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Biochemistry
- REFLECT AND APPLY Would you expect the production of sugars by plants in photosynthesis to be an exergonic or endergonic process? Give the reason for your answer.arrow_forwardREFLECT AND APPLY What is the approximate P/O ratio that can be expected if intact mitochondria are incubated in the presence of oxygen, along with added succinate?arrow_forwardREFLECT AND APPLY Show how the reactions of the electron transport chain differ from those in Question 3 when FADH2 is the starting point for electron transport. Show how the reactions that liberate enough energy to drive the phosphorylation of ADP differ from the pathway when NADH is the starting point.arrow_forward
- REFLECT AND APPLY Why is it useful to plot rate data for enzymatic reactions as a straight line rather than as a curve?arrow_forwardREFLECT AND APPLY Metabolic cycles are rather common (Calvin cycle, citric acid cycle, urea cycle). Why are cycles so useful to organisms?arrow_forwardREFLECT AND APPLY If photosynthesizing plants are grown in the presence of 14CO2, is every carbon atom of the glucose that is produced labeled with the radioactive carbon? Why or why not?arrow_forward
- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage Learning