In photosynthesis, which of the following is NOT true about the light-dependent (“light”) reaction? In photosynthesis, which of the following is NOT true about the light-dependent (“light”) reaction? Glucose is synthesized from CO2 and water during the light-dependent reaction The light-dependent reaction converts light energy to chemical energy stored in ATP  The light-dependent reaction (non-cyclic) captures electrons in NADPH  Light-excited electrons in chlorophyll provide the energy for ATP production None of the other four answers (All are true of the light-dependent reaction)

Photosynthesis and Respiration are opposing processes. One is required to produce food, the other to derive energy from food. Each of these processes involves a cycle to complete its goal. For Photosynthesis it is the Calvin Cycle; for Respiration it is the Krebs Cycle. Listed below are features of both cycles. Indicate which 5 of them are associated with the Calvin Cycle. Creates glucose ATP and CO2 are used ATP and CO2 are produced O A catabolic process An anabolic process. Oxidizes glucose O Occurs in mitochondria O Occurs in chloroplasts Occurs only in green organisms Occurs in all organisms

The Calvin cycle reactions are sometimes called the “lightindependent reactions” or “dark reactions” to contrast them with the light (or light-dependent) reactions. Can the Calvin cycle be sustained in algae that are kept in total darkness for several days? Why or why not

Why does cyanide inhibit electron transport but not photosynthesis? O In animals cyanide binding to complex IV blocks electron transport and therefore ATP synthesis, in photosynthesis this complex has other hemes that cyanide cannot bind and therefore is not inhibited. O In animals cyanide binding to complex IV blocks electron transport and therefore ATP synthesis, in photosynthesis this complex is not used and therefore is not inhibited. O In animals cyanide binding to complex IV prevents hydrogen gradient formation and therefore ATP synthesis, in photosynthesis this complex is not used and therefore is not inhibited. O In animals cyanide binding to complex IV blocks electron transport and therefore ATP synthesis, in photosynthesis uses multiple complex IVs that cyanide cannot bind and therefore is not inhibited.

What single molecule is important in all of the following processes? : electron donor to FNR, can participate in the formation of plastohydroquinone (PQH2), contributes to regulation of Calvin cycle enzymes

A culture of the single celled organism Chlamydomonas is actively carrying out photosynthesis in the presence of light and CO2. If you turned off the light, how would you expect the amounts of ribulose 1,5-bisphosphate and 3-phosphoglycerate to change over the next minute? How about if you left the light on and removed the CO2? Please answer these questions with specific references to the Calvin cycle.

Plants undergo both photosynthesis and cellular respiration. Why don’t plants simply use the ATP pro¬duced in the light reactions of photosynthesis to drive cellular processes?   A) The ATP produced during photosynthesis is chemically different from the ATP produced during cellular respiration and cannot be used for anabolic reactions   B) ATP cannot be stockpiled so the plants would have no energy during non-daylight hours C) The plants have no way of getting the ATP made during photosynthesis out of the chloroplasts to the rest of the cell D) Plants rely on cellular respiration to remove excess O2 and prevent photorespiration

NAME: Part I- Illuminating Photosynthesis #1: Fill in this concept map depicting the major steps in photosynthesis in the chloroplast: H,0 absorption of absorption of Photosystem I containing, containing. pumps transfers Word Bank: to produce Electron Transport Chain ATP Synthase Calvin Cycle Light synthesizes АТР NADPH Chlorophyll Protons CO2 Photosystem II Electrons O2 synthesizes G3P (Sugar Building Block) #2: Fill in the table: Does this step depend on any other step? How? What would happen if an herbicide disrupted this step? Experimental variable to Major Steps in Photosynthesis measure? Photosystem Il Photosystem I ATP Synthase Calvin Cycle Worksheets for “Killing Chloroplasts" by Angela K. Hartsock NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCE

(c) Compare the differences between oxidative phosphorylation and photophosphorylation by redrawing (if necessary) and completing the table given below: Table 1: Comparison of oxidative phosphorylation and photophosphorylation Oxidative phosphorylation Photophosphorylation Organelle Source of electrons Final electron acceptor Source of energy Role of ATP

Light Reactions Dark Reactions Sugar Chloroplast Light ATP NADPH Calvin cycle NADP ADP Granum H,0 co, Figure 7.3. Processes of photosynthesis. The light reactions directly require light energy from the sun. The "dark reactions" are driven by the high energy electrons produced by the light reactions. Which part of photosynthesis do you think they call the synthesis reactions?