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Concept explainers
Interpretation:
The principal metal ions used in electron transfer in chloroplasts are to be determined and their comparison with the ions found in the mitochondria is to be done.
Concept introduction:
Chloroplast and mitochondria are the organelles of the plant having a high metal ion demand and they represent the essential components of the metal homeostasis network in the photosynthetic cell.
The main reason for the presence of transition metals in the electron transport chain is the presence of empty d orbitals, which can accommodate electrons.
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Chapter 22 Solutions
Bundle: Biochemistry, Loose-leaf Version, 9th + Owlv2,1 Term Printed Access Card
- 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 advantage of having a Q cycle in electron transport in spite of its complexity?arrow_forwardREFLECT AND APPLY Metabolic cycles are rather common (Calvin cycle, citric acid cycle, urea cycle). Why are cycles so useful to organisms?arrow_forward
- REFLECT 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_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_forwardRECALL Which of the following are spontaneous processes? Explain your answer for each process. (a) The hydrolysis of ATP to ADP and Pi Pi (b) The oxidation of glucose to CO2 and H2O by an organism (c) The phosphorylation of ADP to ATP (d) The production of glucose and O2 from CO2 and H2O in photosynthesisarrow_forward
- REFLECT 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_forwardREFLECT AND APPLY You wish to separate and purify enzyme A from contaminating enzymes B and C. Enzyme A is found in the matrix of the mitochondria. Enzyme B is embedded in the mitochondrial membrane, and enzyme C is found in the peroxisome. Enzymes A and B have molecular weights of 60,000 Da. Enzyme C has a molecular weight of 100,000 Da. Enzyme A has a pI of 6.5. Enzymes B and C have pI values of 7.5. Design an experiment to separate enzyme A from the other two enzymes.arrow_forwardREFLECT AND APPLY Why is it important that energy released by exergonic reactions can be used to provide energy for endergonic reactions?arrow_forward
- RECALL How is the structure of chloroplasts similar to that of mitochondria? How does it differ?arrow_forwardREFLECT AND APPLY What is the role of citrate in the transport of acetyl groups from the mitochondrion to the cytosol?arrow_forwardREFLECT AND APPLY An enzyme catalyzes the formation of ATP from ADP and phosphate ion. What is its effect on the rate of hydrolysis of ATP to ADP and phosphate ion?arrow_forward
- BiochemistryBiochemistryISBN:9781305961135Author:Mary K. Campbell, Shawn O. Farrell, Owen M. McDougalPublisher:Cengage Learning
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