# Chapter 10 MasteringBio Homework

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Part A - Photosynthesis and respiration in plants
Drag the labels from the left to their correct locations in the concept map on the right. Not all labels will be used.
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Terms in this set (53)
Part A - Inputs and outputs of the light reactions
From the following choices, identify those that are the inputs and outputs of the light reactions. (Recall that inputs to chemical reactions are modified over the course of the reaction as they are converted into products. In other words, if something is required for a reaction to occur, and it does not remain in its original form when the reaction is complete, it is an input.)
Drag each item to the appropriate bin. If the item is not an input to or an output from the light reactions, drag it to the "not input or output" bin.
Part C - Redox reactions of photosynthesis
In photosynthesis, a redox compound that is produced in the light reactions is required to drive other redox reactions in the Calvin cycle, as shown in this figure along with other components of photosynthesis.
Drag the terms to the appropriate blanks to complete the following sentences summarizing the redox reactions of photosynthesis. Terms may be used once, more than once, or not at all
1. In the light reactions, light energy is used to oxidize H2O to O2.

2. The electrons derived from this oxidation reaction in the light reactions are used to reduce NADP+ to NADPH.

4. The electrons derived from this oxidation reaction in the Calvin cycle are used to reduce CO2 to G3P.
Part D - Chloroplast structure and function
In eukaryotes, all the reactions of photosynthesis occur in various membranes and compartments of the chloroplast.
Identify the membranes or compartments of the chloroplast by dragging the blue labels to the blue targets.
Then, identify where the light reactions and Calvin cycle occur by dragging the pink labels to the pink targets.
Note that only blue labels should be placed in blue targets, and only pink labels should be placed in pink targets.
Part A - Functions of the photosystems
The light reactions require the cooperation of two photosystems to power linear electron flow from water to NADP+.
Drag each item into the appropriate bin depending on whether the process is associated with Photosystem II (PS II) only, Photosystem I (PS I) only, or both PS II and PS I.
Note that "electron transport chain" here refers to the electron transport chain between the two photosystems, not the one that functions after PS I.
Part A - Following carbon atoms around the Calvin cycle
The net reaction of the Calvin cycle is the conversion of CO2 into the three-carbon sugar G3P. Along the way, reactions rearrange carbon atoms among intermediate compounds and use the ATP and NADPH produced by the light reactions. In this exercise, you will track carbon atoms through the Calvin cycle as required for the net production of one molecule of G3P.
For each intermediate compound in the Calvin cycle, identify the number of molecules of that intermediate and the total number of carbon atoms contained in those molecules. As an example, the output G3P is labeled for you: 1 molecule with a total of 3 carbon atoms.
Labels may be used once, more than once, or not at all.
Part B - Quantifying the inputs of ATP and NADPH and output of Pi
The Calvin cycle depends on inputs of chemical energy (ATP) and reductant (NADPH) from the light reactions to power the conversion of CO2 into G3P. In this exercise, consider the net conversion of 3 molecules of CO2 into 1 molecule of G3P.
Drag the labels to the appropriate targets to indicate the numbers of molecules of ATP/ADP, NADPH/NADP+, and Pi (inorganic phosphate groups) that are input to or output from the Calvin cycle.
Labels can be used once, more than once, or not at all.