Photosynthesis POGIL answers
10. In Model 2, label the diagram with "A", "B", and "C" to indicate where the
three steps in the box are occurring. - ANSWER-"A" occurs in Photosystem II,
"B" occurs in the ETC, and "C" occurs in the ATP synthase
.11. The light-dependent reactions include an electron transport chain system
that works in a very similar fashion to the electron transport chain in
respiration. Briefly describe how this system works and what job it performs in
the light-dependent reactions. (Your answer should include a discussion about
concentration gradient.). - ANSWER-The electrons go against the concentration
gradient and then something happens
.12a. Name the embedded protein complex found in the thylakoid membrane
that uses excited electrons the reduce NADP+ into NADPH. - ANSWER-
Photosystem I
.12b. Name the embedded protein complex found in the thylakoid membrane
that uses excited electrons to the electron transport chain. - ANSWER-
Photosystem II
.12c. Name the embedded protein complex found in the thylakoid membrane
that uses excited electrons. - ANSWER-ATP Synthase
.13a. Once a chlorophyll molecule has released electrons it is no longer useful
until those electrons are replaced. What is the source of replacement electrons
for those released from photosystem I? - ANSWER-Electron transport chain
, .13b. What is the source of replacement electrons for those released from
photosystem II? - ANSWER-Electrons from the splitting of water
.14. Is carbon dioxide involved in light-dependent reactions? - ANSWER-No
.15b. 12 water molecules are shown as reactants, but six water molecules are
shown as products. Are any of the 12 water molecules products of the light-
dependent reactions? - ANSWER-No, water molecules are not products in the
light-dependent reactions of photosynthesis.
.16. Where do the ATP and NADPH produced during the light-dependent
reactions go when the process is complete? - ANSWER-Calvin cycle (light-
independent cycle)
.17. What are the three phases of the calvin cycle? - ANSWER-Carbon fixation,
regeneration, reduction.
.1b. Is this organelle more likely to be found in animal cells or plant cells? -
ANSWER-Plant cells
.2. The structures inside the organelle in Model 1 are called thylakoids. What
compound necessary for photosynthesis is contained in the thylakoids? -
ANSWER-Chlorophyll
.20. Explain what happened to the carbon atoms from the carbon dioxide
molecules that entered the Calvin cycle. - ANSWER-Carbon fixation turns it into
PGA
10. In Model 2, label the diagram with "A", "B", and "C" to indicate where the
three steps in the box are occurring. - ANSWER-"A" occurs in Photosystem II,
"B" occurs in the ETC, and "C" occurs in the ATP synthase
.11. The light-dependent reactions include an electron transport chain system
that works in a very similar fashion to the electron transport chain in
respiration. Briefly describe how this system works and what job it performs in
the light-dependent reactions. (Your answer should include a discussion about
concentration gradient.). - ANSWER-The electrons go against the concentration
gradient and then something happens
.12a. Name the embedded protein complex found in the thylakoid membrane
that uses excited electrons the reduce NADP+ into NADPH. - ANSWER-
Photosystem I
.12b. Name the embedded protein complex found in the thylakoid membrane
that uses excited electrons to the electron transport chain. - ANSWER-
Photosystem II
.12c. Name the embedded protein complex found in the thylakoid membrane
that uses excited electrons. - ANSWER-ATP Synthase
.13a. Once a chlorophyll molecule has released electrons it is no longer useful
until those electrons are replaced. What is the source of replacement electrons
for those released from photosystem I? - ANSWER-Electron transport chain
, .13b. What is the source of replacement electrons for those released from
photosystem II? - ANSWER-Electrons from the splitting of water
.14. Is carbon dioxide involved in light-dependent reactions? - ANSWER-No
.15b. 12 water molecules are shown as reactants, but six water molecules are
shown as products. Are any of the 12 water molecules products of the light-
dependent reactions? - ANSWER-No, water molecules are not products in the
light-dependent reactions of photosynthesis.
.16. Where do the ATP and NADPH produced during the light-dependent
reactions go when the process is complete? - ANSWER-Calvin cycle (light-
independent cycle)
.17. What are the three phases of the calvin cycle? - ANSWER-Carbon fixation,
regeneration, reduction.
.1b. Is this organelle more likely to be found in animal cells or plant cells? -
ANSWER-Plant cells
.2. The structures inside the organelle in Model 1 are called thylakoids. What
compound necessary for photosynthesis is contained in the thylakoids? -
ANSWER-Chlorophyll
.20. Explain what happened to the carbon atoms from the carbon dioxide
molecules that entered the Calvin cycle. - ANSWER-Carbon fixation turns it into
PGA
