Plant Structures
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AP Biology › Plant 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.
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 of the following is true regarding meristem tissue in plants?
All of these
It contains undifferentiated cells
It is present in areas of growth
There is a shoot and root apical meristem
Explanation
Meristem tissue contains undifferentiated cells and allows for plant growth. Apical meristems are found in areas of growth, which include the shoot and roots—cells in these tissues divide rapidly.
In plants, leaves contain specialized pores used for gas exchange. Each pore is formed by a pair of cells that control its closing and opening. What are these cells called?
Guard cells
Stoma cells
Cuticle cells
Epidermal cells
Explanation
For proper functioning, plants must take in carbon dioxide, expel oxygen, and limit the loss of water vapor. This gas exchange takes place via pores called stomata. These pores are formed by a pair of adjacent cells that can open and close in response to a number of factors. These cells are called guard cells.
The cuticle and epidermis are layers of leaf structure, and do not correspond to specific cell types. The stoma is the name of a single pore itself, not its surrounding cells.
In plants, leaves contain specialized pores used for gas exchange. Each pore is formed by a pair of cells that control its closing and opening. What are these cells called?
Guard cells
Stoma cells
Cuticle cells
Epidermal cells
Explanation
For proper functioning, plants must take in carbon dioxide, expel oxygen, and limit the loss of water vapor. This gas exchange takes place via pores called stomata. These pores are formed by a pair of adjacent cells that can open and close in response to a number of factors. These cells are called guard cells.
The cuticle and epidermis are layers of leaf structure, and do not correspond to specific cell types. The stoma is the name of a single pore itself, not its surrounding cells.
Which of the following is true regarding meristem tissue in plants?
All of these
It contains undifferentiated cells
It is present in areas of growth
There is a shoot and root apical meristem
Explanation
Meristem tissue contains undifferentiated cells and allows for plant growth. Apical meristems are found in areas of growth, which include the shoot and roots—cells in these tissues divide rapidly.
In plants, leaves contain specialized pores used for gas exchange. Each pore is formed by a pair of cells that control its closing and opening. What are these cells called?
Guard cells
Stoma cells
Cuticle cells
Epidermal cells
Explanation
For proper functioning, plants must take in carbon dioxide, expel oxygen, and limit the loss of water vapor. This gas exchange takes place via pores called stomata. These pores are formed by a pair of adjacent cells that can open and close in response to a number of factors. These cells are called guard cells.
The cuticle and epidermis are layers of leaf structure, and do not correspond to specific cell types. The stoma is the name of a single pore itself, not its surrounding cells.
Which of the following is true regarding meristem tissue in plants?
All of these
It contains undifferentiated cells
It is present in areas of growth
There is a shoot and root apical meristem
Explanation
Meristem tissue contains undifferentiated cells and allows for plant growth. Apical meristems are found in areas of growth, which include the shoot and roots—cells in these tissues divide rapidly.
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.