categorize the 5 items into the 3 groups There are a number of similarities, and

Question

categorize the 5 items into the 3 groups

There are a number of similarities, and some differences, between the Qcycle in the mitochondrial electron transport system and the PQ cycle found in the chloroplast electron transport system. Sort the items into the appropriate locations, depending on whether they are unique to the PQ cycle, unique to the Qcycle, or common to both. Items (5 items) (Drag and drop into the appropriate area below) Two electrons are transferred from the reduced carrier to cytochrome c. The cycle converts a two- electron transfer process into two one-electron transfer Two electrons are transferred from the reduced carrier to plastocyanin. Used to translocate protons across a membrane. Addition of electrons one at a time generates a semiquinone intermediate. rocesses. Categories Unique to the Q Cycle Unique to the PQ Cycle Similar in Both Cycles

Explanation / Answer

-Two electrons are transfered from reducedcarrier (QH2) to cytochrome C. Belongs to Q-cycle.

-The cycle coverts a two electrons transport system to two one electron transport processes. Belongs to both cycles.

Explaination: in each cycle single electron is transported in order for two times.

-two electrons are transfered from reduced carrier to plastocyanin- belongs to PQ cycle. Seen in thylakoids.

-used to translocate protons across membrane.- belongs to both cycles as both are used in ATP synthase.

-addition of electrons one at a time generates semiquinone intermediate.- seen in both cycles.

Plastoquinone and ubiquinone are the semiquinone intermediates,which are unstable and ready to react.

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