Mark ALL that are true for cyclic photophosphorylation. Select one or more: a. Requires Photosystem II but not Photosystem I. b. Electrons are recycled back to the original photosystem, and therefore water is not required as an electron donor. c. Generates O2 and ATP, but not NADPH. d. Enables electrons to bypass the electron transport chain between the two photosystems. e. It is coupled to proton transport into the stroma.

Imagine that ferredoxin is no longer able to participate in cyclic electron flow but is otherwise unaffected. What is the logical result? Select all statements that are true below. O a. Water would be oxidized O b. The Calvin cycle would stop U c. NADPH would no longer be made O d. ATP would no longer be made U e. The light reactions would stop

Which of the following processes during photosynthesis is incorrectly coupled to its typical location? Select one: a. Rubisco catalyzes carbon fixation—stroma b. ATP is produced via ATP synthase—thylakoid lumen c. NADPH is oxidized to NADP+—stroma d. Oxygen gas is produced by splitting of water—thylakoid lumen e. Activated P680 donates an electron to the primary electron acceptor—thylakoid membranes

Choose all that apply: The final electron acceptor(s) associated with photosystem II is/are: NADP+ 02 Photosystem I ATP

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

Which of the following pathways will split water and produce oxygen Select one: a. Gluconeogenesis b. Photosystem II c. Calvin Cycle d. Photosystem I e. Rubisco

Why is a hypotonic buffer used for the resuspension? 1.DCPIP passes easily across the intact chloroplast membrane, but can't get into the thylakoid, so electron transport could not be reliably measured if using a hypotonic buffer. 2.To gently lyse the chloroplasts, leaving the electron transport membranes intact, whilst allowing DCPIP access 3.To gently separate the chloroplasts from each other, leaving the electron transport membranes intact, whilst allowing DCPIP access 4.DCPIP cannot easily across the intact chloroplast membrane, so electron transport could not be reliably measured if using a hypotonic buffer.

When light is absorbed in a green plant  a. There is a transfer of electrons that results in the production or CO2 and H2O b. ATP is reduced to ADP, releasing energy that will be used in the grana to produce glucose  c. photolysis takes place, eliminating the need for the calvin benson cycle  d. electrons of chlorophyll are energized, and the energy is released to produce ATP and NADPH aerobic and anaerobic is similar in that they both are a. release energy from glucose  b. produce O2 as a waste product  c. takes place in the mitochondria  d. result in the accumulation of lactic acid

Explain why inhibiting the oxidation of NADPH in the Calvin cycle will also inhibit the light reactions.

C3 and C4 plants differ through a. cyclic vs non-cyclic photophosphorylation. different reaction centres that collect photon energy. the reduction of NADP+ the activity of PEP to combine with CO2. different methods of breaking H2O into O, 2e and 2H. C d b