WORLD OF CELL+MASTERING ACCESS >CUSTOM
9th Edition
ISBN: 9781323445044
Author: Hardin
Publisher: PEARSON C
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Chapter 11, Problem 11.1PS
True or False Indicate whether each of the following statements is true (T) or false (F).
(a) Sucrose is synthesized in the chloroplast stroma and exported from photosynthetic cells to provide energy and reduced carbon for nonphotosynthetic plant cells.
(b) Ninety percent of the solar energy collected by a photosystem complex is absorbed when photons strike a special pair of chlorophyll molecules at the reaction center of the complex.
(c) The energy requirement expressed as ATP consumed per molecule of carbon dioxide fixed is higher for a C3 plant than for a C4 plant.
(d) The ultimate electron donor for the photosynthetic generation of NADPH is always water.
(e) The enzyme rubisco is unusual in that, depending on conditions, it exhibits two different enzymatic activities.
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Chapter 11 Solutions
WORLD OF CELL+MASTERING ACCESS >CUSTOM
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- Chloroplast ATP synthase contains 14 c subunits. How many protons must be translocated to the thylakoid lumen to support the synthesis of one ATP?arrow_forwardGiven an equal amount of photons, what is the order of increasing effectiveness of blue, red, green, and white light (combination of the three main wavelengths) on photosynthetic activity?arrow_forwardIs it reasonable to list standard reduction potentials for the reactions of photosynthesis? Why or why not?arrow_forward
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- 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?arrow_forwardTrue or False? In photosynthesis, both photosystems (I and II) depend on the energy of sunlight to excite a chlorophyll molecule until it releases an electron.arrow_forwardIt is believed that the ratio of cyclic photophosphorylation to noncyclic photophosphorylation changes in response to metabolic demands. In each of the following situations, would you expect the ratio to increase, decrease, or remain unchanged? (a) Chloroplasts carrying out both the Calvin cycle and the reduction of nitrite (NO2 -) to ammonia (This process does not require ATP.) (b) Chloroplasts carrying out not only the Calvin cycle but also extensive active transport (c) Chloroplasts using both the Calvin cycle and the C4 pathwayarrow_forward
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