Cellular Structures
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AP Biology › Cellular Structures
Which process is incorrectly matched with its location?
in the light independent reaction, G3P is produced in the thylakoid stroma
carbon fixation during the light independent reaction occurs in the thylakoid stroma
in the light dependent reaction, protons flow down their electrochemical gradient from the thylakoid lumen into the stroma, through the ATP synthase protein
in the light dependent reaction, protons are pumped from the thylakoid stroma into the lumen
Explanation
During the light dependent reaction, protons are pumped from the thylakoid stroma into the lumen. Then, these protons flow down their electrochemical gradient (from high concentration to low concentration), through the ATP synthase protein, producing ATP.
Which process is incorrectly matched with its location?
in the light independent reaction, G3P is produced in the thylakoid stroma
carbon fixation during the light independent reaction occurs in the thylakoid stroma
in the light dependent reaction, protons flow down their electrochemical gradient from the thylakoid lumen into the stroma, through the ATP synthase protein
in the light dependent reaction, protons are pumped from the thylakoid stroma into the lumen
Explanation
During the light dependent reaction, protons are pumped from the thylakoid stroma into the lumen. Then, these protons flow down their electrochemical gradient (from high concentration to low concentration), through the ATP synthase protein, producing ATP.
Where is chlorophyll located?
Thylakoid stroma
Thylakoid membrane
Mitochondrial membrane
Intermembrane space
Explanation
Chlorophyll is used to capture sunlight during the light dependent reaction; the excited electrons then flow down the electron transport chain located on the thylakoid membrane.
Where is chlorophyll located?
Thylakoid stroma
Thylakoid membrane
Mitochondrial membrane
Intermembrane space
Explanation
Chlorophyll is used to capture sunlight during the light dependent reaction; the excited electrons then flow down the electron transport chain located on the thylakoid membrane.
Which of the following terms can be described as the green pigment located within chloroplasts?
Chlorophyll
Mesophyll
Stomata
Photoreceptors
Explanation
Chlorophyll is what gives plants their green color. The chlorophyll located in the chloroplasts captures the light energy that drives the synthesis of food molecules in the chloroplasts—photosynthesis.
Which of the following terms can be described as the green pigment located within chloroplasts?
Chlorophyll
Mesophyll
Stomata
Photoreceptors
Explanation
Chlorophyll is what gives plants their green color. The chlorophyll located in the chloroplasts captures the light energy that drives the synthesis of food molecules in the chloroplasts—photosynthesis.
Where in the chloroplasts does the Calvin Cycle of photosynthesis take place?
Stroma
Thylakoid membrane
Thylakoid lumen
Intermembrane space
Grana
Explanation
The Calvin Cycle occurs in the stroma, the aqueous fluid-filled area of the chloroplast. The stroma can be seen as analogous to the cytoplasm of a cell, in that it is the liquid in which all other substructures reside. The other processes of photosynthesis, the light-dependent reactions, take place in the thylakoid, a membrane-bound substructure within the chloroplast.
During the light dependent reaction, the proton gradient is established. Where is the concentration of protons the greatest?
thylakoid lumen
thylakoid stroma
thylakoid membrane
intermembrane space
Explanation
During the light dependent reaction, protons are pumped from the thylakoid stroma into the lumen. Then, these protons flow down their electrochemical gradient (from high concentration to low concentration), through the ATP synthase protein, producing ATP.
Where in the chloroplasts does the Calvin Cycle of photosynthesis take place?
Stroma
Thylakoid membrane
Thylakoid lumen
Intermembrane space
Grana
Explanation
The Calvin Cycle occurs in the stroma, the aqueous fluid-filled area of the chloroplast. The stroma can be seen as analogous to the cytoplasm of a cell, in that it is the liquid in which all other substructures reside. The other processes of photosynthesis, the light-dependent reactions, take place in the thylakoid, a membrane-bound substructure within the chloroplast.
During the light dependent reaction, the proton gradient is established. Where is the concentration of protons the greatest?
thylakoid lumen
thylakoid stroma
thylakoid membrane
intermembrane space
Explanation
During the light dependent reaction, protons are pumped from the thylakoid stroma into the lumen. Then, these protons flow down their electrochemical gradient (from high concentration to low concentration), through the ATP synthase protein, producing ATP.