Certain halophytes can tolerate high salinity by accumulating ions like and in their vacuoles. Which membrane transport protein is MOST directly involved in this process?
Plasma membrane -ATPase
Tonoplast antiporter
Plasma membrane channel
Tonoplast aquaporin
Related Questions
What is the primary role of carrier proteins in ion uptake?
Store ions within the vacuole
Convert ions into usable forms
Facilitate the movement of ions across the cell membrane
Prevent the entry of unwanted ions
Iron deficiency in plants often leads to interveinal chlorosis. Considering the role of iron in electron transport and chlorophyll synthesis, which statement BEST explains this observation?
Iron is a key component of the electron transport chain, and its deficiency disrupts energy production needed for chlorophyll synthesis in the interveinal areas.
Iron is essential for chlorophyll synthesis, and its deficiency leads to reduced chlorophyll production, primarily in the interveinal areas.
Iron deficiency primarily affects the vascular tissue of the leaves, leading to reduced chlorophyll transport to the interveinal areas.
Iron deficiency enhances chlorophyll degradation in the interveinal areas, leading to chlorosis.
Which of the following statement is true about the passive uptake of ions?
Passive uptake may be non-mediated or mediated
Passive uptake is always mediated
Passive uptake is always non-mediated
None of the above
Efflux is the movement of ions
From one cell to another
Within the cell
Into the cell
Out of the cell
Which of the following statements are correct about mineral absorption in plants?
In the initial phase, ions are taken up into the outer space of cells, the apoplast. It is a passive process
In the final phase, ions are taken slowly into the inner space, the symplast of cells and it is an active process
Passive movement of the ions into the apoplast occurs through ion channels, transmembrane proteins, which acts as selective pores
All of the above
Soil is able to maintain a regular supply of minerals by the help of which of the following?
I. Slow vegetation
II. Activity of decomposers
III. Soil erosion
IV. Weathering of rocks
I and III only
II and IV only
I, II, and III only
I, III, and IV only
The entry and exit of ions to and from the symplast requires the expenditure of
Photosynthetic energy
Metabolic energy
Energy derived from ions
Zero amount of energy
In the initial phase of minerals absorption ions are taken up
Slowly
Rapidly
Fluently
Simultaneously
Mycorrhizae enhance nutrient uptake in plants primarily by increasing:
Rate of transpiration
Root hair length
Surface area for absorption
Photosynthetic rate
Absorption of minerals takes place in the form of
Molecules
Compounds
Ions
Mixtures
