The uptake of which ion is most significantly affected by the availability of oxygen in the soil?
Potassium
Phosphate
Nitrate
Sulfate
Related Questions
The Nernst equation can be used to predict the membrane potential if a membrane is permeable to a single ion. If the external concentration of is 10 mM and the internal concentration is 100 mM at 25°C, calculate the Nernst potential for . (R = 8.314 J/mol·K, F = 96485 C/mol)
+59 mV
-59 mV
+29.5 mV
-29.5 mV
Which of the following are reservoirs for phosphorus and nitrogen cycle respectively?
Atmosphere and bedrocks
Bedrocks and atmosphere
Consumers
Atmosphere and producers
In the final phase of mineral absorption, ions are taken up into the …… space of cells
outer
inner
middle
peripheral
The major characteristics of colloids is/are
Homogeneous nature, particle size less than 1nm, transparent, and settling nature
Heterogeneous nature, particle size range of 1nm-1000nm, Tyndall effect, and non-settling nature
Homogeneous nature, particle size greater than 1000nm, opaque, and settling nature
Heterogeneous nature, variable particle size, no Tyndall effect, and settling nature
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
Which of the following are reservoirs for phosphorus and nitrogen cycle respectively?
Atmosphere and bedrocks
Bedrocks and atmosphere
Consumers
Atmosphere and producers
A researcher is studying ion uptake in plant roots using radioactive tracers. They observe that metabolic inhibitors significantly reduce the uptake of potassium ions, but not the uptake of chloride ions. What can be inferred about the uptake mechanisms of these two ions?
Potassium uptake is primarily active, while chloride uptake may be passive or facilitated.
Both potassium and chloride uptake are primarily active processes.
Both potassium and chloride uptake are primarily passive processes.
Chloride uptake is primarily active, while potassium uptake may be passive or facilitated.
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
The uptake of which ion is most significantly affected by the availability of oxygen in the soil?
Potassium
Phosphate
Nitrate
Sulfate
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
