Which of the following combinations correctly matches the ion, its role in plants, and a typical mechanism of its uptake?
(A) Calcium - Cell wall component - Symport with protons
(B) Potassium - Stomatal regulation - Channel proteins
(C) Nitrate - Nucleic acid synthesis - Active transport through ATPases
(D) Magnesium - Chlorophyll constituent - Passive diffusion
A
B
C
D
Related Questions
Bidirectional translocation of minerals takes place in
xylem
phloem
parenchyma
cambium
Which of these is NOT directly involved in the active uptake of ions by plant roots?
Root hairs
Casparian strip
Plasma membrane ATPase
Stomata
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
In case of Nitella, ,, and Na follows
Passive diffusion
Facilitated diffusion
Mass flow
Ionic exchange
For the uptake of ions in the second phase of absorption of minerals, the pathway followed is called
Passive uptake
Active uptake
Neutral
None of these
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 Casparian strip in the root endodermis primarily aids in:
Preventing water loss from the root
Increasing surface area for absorption
Storing excess ions
Regulating the entry of water and minerals into the xylem
Efflux is the movement of ions
From one cell to another
Within the cell
Into the cell
Out of the cell
In the initial phase of minerals absorption ions are taken up
Slowly
Rapidly
Fluently
Simultaneously
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
