Which of the following is NOT a factor affecting the uptake of mineral ions by plants?
Soil pH
Concentration of mineral ions in the soil
Presence of chlorophyll
Root hair density
Related Questions
Which of the following is essential for the active uptake of mineral ions?
Water
Sunlight
ATP
Carbon dioxide
Which of the following is NOT a factor affecting the uptake of mineral ions by plants?
Soil pH
Concentration of mineral ions in the soil
Presence of chlorophyll
Root hair density
The uptake of potassium (K+) by plant roots can be described by the Michaelis-Menten kinetics. If the maximum uptake rate (Vmax) for K+ is reached at a relatively low external K+ concentration, what can be inferred about the affinity of the K+ transporter?
The K+ transporter has a low affinity for K+.
The K+ transporter is non-specific for K+.
The K+ transporter is inhibited by high K+ concentrations.
The K+ transporter has a high affinity for K+.
The Casparian strip in the endodermis primarily regulates:
Movement of water through the xylem
Entry of water and minerals into the stele
Transpiration rate
Photosynthesis in the leaves
Unlike facilitated diffusion, active transport:
Does not require energy
Occurs down a concentration gradient
Uses protein channels
Requires energy
Casparian strips in the endodermis primarily regulate the:
Rate of transpiration
Entry of water into the xylem
Entry of minerals into the xylem
Movement of sugars through phloem
Plant obtain carbon and most of their oxygen from
Soil
Water
from the atmosphere
Symbiotic organisation
Which of the following is NOT a mechanism by which mycorrhizae enhance mineral uptake in plants?
Increasing the surface area for absorption
Producing chelating agents that solubilize minerals
Directly converting atmospheric nitrogen into usable forms for the plant
Improving the plant's access to phosphorus
A researcher is studying the uptake of iron (Fe) by plant roots. They observe that the process is significantly inhibited by the presence of respiratory inhibitors. Which of the following best explains this observation?
Iron uptake is a passive process driven by diffusion.
Iron uptake is facilitated by anaerobic respiration.
Iron uptake is coupled with the release of oxygen.
Iron uptake is an active process requiring energy from respiration.
Iron deficiency in plants often leads to interveinal chlorosis. This is primarily due to the role of iron in:
Cell wall formation
Stomatal regulation
Synthesis of chlorophyll
Potassium uptake
