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
Related Questions
Which process is responsible for the uptake of mineral ions against the concentration gradient?
Diffusion
Osmosis
Passive transport
Active transport
Casparian strips in the endodermis primarily regulate the entry of ions into the:
Cortex
Epidermis
Stele
Root hairs
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
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
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
A plant exposed to high levels of aluminum in the soil exhibits stunted root growth. Which of the following mechanisms is the MOST likely cause of this effect?
Aluminum directly inhibits photosynthesis, reducing energy available for root growth.
Aluminum competes with potassium for uptake, leading to potassium deficiency in roots.
Aluminum interferes with the function of calcium channels and disrupts cell wall formation.
Aluminum stimulates excessive ethylene production, inhibiting root elongation.
What is the major function of air stone?
Remove content from the nutrient solution
Dissolves in the nutrient solution
Increases the level of in the nutrient solutions
Removes from the nutrient solution
Which of the following are reservoirs for phosphorus and nitrogen cycle respectively?
Atmosphere and bedrocks
Bedrocks and atmosphere
Consumers
Atmosphere and producers
Efflux is the movement of ions
From one cell to another
Within the cell
Into the cell
Out of the cell
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
