Which of the following is essential for the active uptake of mineral ions?
Water
Sunlight
ATP
Carbon dioxide
Related Questions
Researchers observed that a specific plant species accumulates high levels of cadmium (Cd) in its tissues, even when grown in soil with relatively low Cd concentrations. Which transport mechanism is MOST likely responsible for this observation?
Passive diffusion across the cell membrane
Facilitated diffusion through non-specific channels
Active transport through Cd-specific transporters with high affinity
Endocytosis of Cd-containing soil particles
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
Unlike facilitated diffusion, active transport:
Does not require energy
Occurs down a concentration gradient
Uses protein channels
Requires energy
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
Plant obtain carbon and most of their oxygen from
Soil
Water
from the atmosphere
Symbiotic organisation
What is the most efficient region of water absorption in roots?
Root cap
Growing point
Zone of elongation
Zone of differentiation
The movement of ions against their concentration gradient across a cell membrane is achieved through:
Diffusion
Osmosis
Facilitated diffusion
Active transport
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.
Which of the following processes requires energy to transport ions from a region of lower concentration to a region of higher concentration across a membrane?
Simple diffusion
Facilitated diffusion
Osmosis
Active transport
Which mineral ion is involved in the opening and closing of stomata?
Calcium
Magnesium
Potassium
Iron
