If you could replace all of the plant ATP synthase with ATP synthase enzymes from animal cells, oriented such that the Fo complex was in the thylakoidmembrane with the open channel facing the thylakoid space, and the F1 complex was present in the stroma, how would this affect the ability ofphotosystem II to generate ATP? Assume that the animal cell ATP synthase functions normally in the chloroplast after replacement.

Chemiosmotic hypothesis explains the mechanism by which ATP is synthesized by the ATP synthase…

If you could replace all of the plant ATP synthase with ATP synthase enzymes from animal cells, oriented such that the Fo complex was in the thylakoid membrane with the open channel facing the thylakold space, and the F1 complex was present in the strama, how would this affect the ability of photosystem II to generate ATP? Assume that the animal cell ATP synthase functions normally in the chloroplast after replacement.

If you could replace all of the plant ATP synthase with ATP synthase enzymes from animal cells, oriented such that the Fo complex was in the thylakoid membrane with the open channel facing the thylakold space, and the F1 complex was present in the strama, how would this affect the ability of photosystem II to generate ATP? Assume that the animal cell ATP synthase functions normally in the chloroplast after replacement.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter20: The Protists

Section: Chapter Questions

Problem 4CT: Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of...

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Identify the chemical basis for ApH and AY across the chloroplast thylakoid membrane by dragging the descriptions to their targets. Be sure to notice that the upper arrow iindicates ApH and the lower arrow indicates ΔΨ. ATP synthase complex H+ N ADP + P₁ Light energy ATP H*N Photosystem I/II- Chloroplast N side Aus PN ApH T + Thylakoid membrane HTp H+p Lumen Stroma P side Proton circuit A B High H concentration Low positive charge High positive charge Low H+ concentration Within the image, identify the types of proton translocation by dragging each label to its target. O XH₂ 2H+ + Z 2 H* ZH₂ O XH₂ Z 2H+ ZH₂ 2H+ C A B Proton pump Redox loop
Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?
Provide a simplified schematic presentation of (non-cyclic) photophosphorylation. Clearly indicate the location and direction of electron and proton flow as well as organelle compartments. (You can also draw the Z-scheme but then you have to include ADP phosphorylation).
For most plants, two distinct photosystems (Photosystem I and Photosystem II) work together in series during photosynthesis. These photosystems are complexes of proteins and pigment molecules. Statement 1: Photosystem I has an absorption maximum of 680 nm, whereas Photosystem II has an absorption maximum of 700 nm. Statement 2: The special pair of chlorophyll a molecules in the reaction center of photosystem I is designated as P700, whereas the special pair of chlorophyll a molecules in the reaction center of photosystem II is designated as P680. Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false.
There are two photosystems involved in the light reaction of photosynthesis. Both take upenergy from the sun in the form of light.A. Where are the photosystems located and what is the name of the organelle? B. Where does the energy that the photosystems take up, go? Describe for eachphotosystem WHERE the energy ends up at the end of the light reactions. In otherwords, what products contain the energy from which photosystem at the end ofthe light reaction?
You performed an experiment on photosynthesis on Elodea, using bromothymol blue as an indicator forpH. Your two light conditions were red light and blue light. You found that in blue light, your solutionturned a nice cobalt blue, and in red light it turned green.a. What can you conclude about the efficiency of photosynthesis in Elodea regarding those twowavelengths?b. What would your conclusion be if your negative control (no Elodea in white light) turned greenalso?
In cyclic photophosphorylation, it is estimated that two electrons must be passed through the cycle to pump enough protons to gener- ate one ATP. Assuming that the AG for hydrolysis of ATP under con- ditions existing in the chloroplast is about –50 kJ/mol, what is the corresponding percent efficiency of cyclic photophosphorylation, using light of 700 nm?
When running cycle photophosphorylation and passaging electrons from PSI to two fully reduced PQH2s, how many photons would be necessary for the electrons to complete one cycle?
Calculate (in kJ/mol) the energy that is required by the Rhodopseudomonas viridis photophosphorylation system to synthesize 3 ATP? (Assume that the R. viridis F1F-ATP synthase c-subunit rotor contains 12 c-subunits and that the R. viridis cytochrome b/c complex translocates 2 H/e". Also assume that the wavelength of lig! is 680 nm.) Number of photons required to synthesize 3 ATP = photons Energy = kJ/mol
Thylakoids were isolated from chloroplasts and incubated in the dark in an acidic solution (pH 4) to equilibrate the pH. After 30 minutes, the thylakoids were transferred to a basic solution (pH 8) and kept in the dark. Will this system produce ATP? Explain. Will this system produce G3P? Explain.
W hen a culture of Chlamydomonas is exposed to HIGH intensity light, the cells will display negative phototaxis and move away from the light. Which of the following could act as a cellular signal triggering movement away from the light? A. Low levels of P700+ relative to P700 in the chloroplast. B. High levels of G3P in the cytosol. C. High levels of NAD+ relative to NADH in mitochondria. D. Low levels of ATP relative to ADP in the cytosol.
For the following questions, choose one to discuss: chloroplast/photosynthesis State at the outset which one you will discuss. A) What role do proton gradients play in the process of photosynthesis proton gradients allow B) Where are proton gradients formed? Within what structures are they seen in chloroplasts How do the structures help them to maintain a gradient? C) Explain where and how the chloroplast or mitochondria uses passive transport and active transport to complete photosynthesis or cellular respiration.