Hin t1reviewofchloroplaststructure se ssionma ste r

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Unformatted text preview: gy is us ed to fix CO2 into s ugar. ANSWER: Correct In the light reac tions , the energy of s unlight is us ed to ox idiz e water (the elec tron donor) to O2 and pas s thes e elec trons to NADP+, produc ing NADPH. Some light energy is us ed to c onv ert ADP to ATP. The NADPH and ATP produc ed are s ubs equently us ed to power the s ugar­produc ing Calv in c y c le. Part B ­ Inputs and outputs of the Calvin cycle From the following c hoic es , identify thos e that are the inputs and outputs of the Calv in c y c le. Drag each item to the appropriate bin. If the item is not an input to or an output from the Calvin cycle, drag it to the “ not input or output” bi n. Hin t 1. T he relationship of light to the Calvin cycle In mos t plants , the Calv in c y c le oc c urs only in the light bec aus e it requires an input of c hemic al energy and reduc ing power from the light reac tions . Howev er, if the c ompounds that s huttle this c hemic al energy and reduc ing power from the light reac tions are artific ially prov ided to a c hloroplas t, the Calv in c y c le c an proc eed in the dark . Cons ider what this means about whether light play s a direc t role in the Calv in c y c le. Hin t 2. What is the product of the Calvin cycle that contains “fixed” carbon? The Calv in c y c le us es energy from the light reac tions to “fix ” inorganic c arbon into s ugar. What is the product of the Calvin cycle that contains this fixed carbon? ANSWER: se ssion.ma ste r ingbiology.c om/myc t/a ssignme ntPr intVie w? a ssignme ntI D= 2242937 27/41 13- 10- 13 Cha pte r 10 CO2 RuBP G3P gluc os e Hin t 3. Which product or products of the Calvin cycle is/are returned as input(s) to the light reactions? Whic h of the following outputs from the Calv in c y c le are als o inputs to the light reac tions ? Select all that apply. ANSWER: A TP NADP+ NADPH G3P ADP ANSWER: Correct In the Calv in c y c le, the energy outputs from the light reac tions (ATP and NADPH) are us ed to power the c onv ers ion of CO2 into the s ugar G3P. As ATP and NADPH are us ed, they p...
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