Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 20, Problem 22P
Interpretation Introduction
Interpretation:
The light-dependent changes in the stroma which regulates the Calvin cycle are to be stated.
Concept introduction:
Photosynthesis is a reaction in which carbon dioxide and water combines together in the presence of sunlight to form glucose and oxygen.
The cycle corresponding to the photosynthesis in which various chemical reaction involves in the conversion of carbon dioxide into glucose is known as Calvin cycle. These
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Chemiosmosis. ATP synthesis in chloroplasts is usually light dependent; it does not happen in the dark.
When researchers shifted isolated chloroplasts from a low pH solution to a more alkaline (higher pH) solution, ATP synthesis occurred even in the absence of light! This was an experiment used to support the chemiosmosis mechanism of ATP formation in chloroplasts. Why?
What would happen if the isolated chloroplasts were shifted to a lower pH solution?
What would be the results if the above experiments were performed in the presence of light?
If these experiments were performed in mitochondria instead of chloroplasts, what results would we expect?
RET or FRET. Resonance energy transfer: a. Results in separation of charge. b. Powers ATP synthesis. c. Allows energy flux in the light-harvesting complex. d. Does not exist
Modified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true.
Triose phosphate is considered as the net product of the Calvin cycle of photosynthesis, which is then utilized for the synthesis of the end products that are glucose and starch.
Chapter 20 Solutions
Biochemistry
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- Modified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. A cyclic pathway runs in Photosystem I to make ATP. Here, electrons are cycled back to photosystem I and NADPH is formed.arrow_forwardphotosynthesis. Historical Discovery Process The chemical changes that occur during photosynthesis have been investigated for the past 300 years. The general highlights of these discoveries help us to understand the basic process of photosynthesis. Three centuries ago people wondered where plants came from. They knew that plants grew out of the ground, but how that happened was a complete mystery to them. The first step in answering the question was to plant a small tree in a large pot supported off the ground. They did this so that the soil of the container was separated from the soil of the earth. Only the dirt in the pot was available to the plant. The people cared for the plant during one year. At the end of the year the small tree had gained 100 kg. (The actual data from this experiment have been changed to simplify the discussion.) 1. What do you think the experimenters considered as two possible sources for the substances (matter) that became incorporated into new tree growth?…arrow_forwardQuestion 5 Review Concept 10.4 Calvin Cycle. Match the term and its description. Each term can only be used once. G3P. ADP, NADP+ and Pi | Choose ) 9 ATP. 6 NADPH, 3 CO2 | Choose J Carbon fixation is catalyzed by this enzyme called | Choose ) This molecule is considered as CO2 acceptor. | Choose J >arrow_forward
- Modified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. During photorespiration, Rubisco acts as carboxylase that catalyzes the reaction of RuBP and oxygen to form phosphoglycolate and PGA in the chloroplast.arrow_forwardModified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true In the process of photosynthesis, the red wavelength is emitted in a process called as phosphorescence.arrow_forwardThe light phase of photosynthesis at the molecular... Photosystem II r QUALI Watch on YouTube Q Search Answer the following questions using the virtual lab light phase video. Where do the electrons for the light reaction come from? How does light cause protons to be pumped? If photosystem 1 (the second photosystem in the chain) is mutated and does not work, will the plant still be able to provide ATP for the Dark reaction? SLO 2 LO M CSU 40 4+ 8 244 9 >11. Share 111 112 +arrow_forward
- Life requires energy. In a short essay (100–150 words), describe the basic principles of bioenergetics in an animal cell. How is the flow and transformation of energy different in a photosynthesizing cell? Include the role of ATP and enzymes in your discussion.arrow_forwardHelp is appreciated. Think of an unusual eukaryotic species in which its ATP synthase has 12 subunits for its c ring. How many ATP molecules can be produced per pair of electrons that traverse the respiratory chian starting at Complex I? A. 2 ATP/2e- B. 1 ATP/2e- C. 0.5 ATP/2e- D. 1.5 ATP/2e- E. 3 ATP/2e-arrow_forwardPlease help! Photosynthesis and Cell respiration: A. What should happen to the O2 levels in a closed container containing a plant during the day? why? B. And what happens to the O2 levels during the night (no light)? Why?arrow_forward
- Life requires energy. Describe the basic principles of bioenergetics in an animal cell. How is the flow and transformation of energy different in a photosynthesizing cell? Include the role of ATP and enzymes in your discussion.arrow_forwardPhotosynthesis. Complete the following statements. Write your answer in the spaces provided. The plant uses the to grow new flowers and flower The leaf releases into the air, and breathe this in. stem The leaves absorb this as energy to mix and use and leaf The leaf has holes underneath it and called are that let mixed by the leaf to make into the leaf. (plant food) and Humans and animals breathe reots The suck up from the soil. The water then travels up the to the leaves.arrow_forwardThe last stop. The final electron acceptor for the electron-transport chain is which of the following? do a. 0202 b. Coenzyme Q с. СО2СО, d. NAD+NAD+arrow_forward
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