The active transport of minerals into root cells is primarily driven by:
Transpiration pull
Root pressure
Proton pumps generating an electrochemical gradient
Capillary action in xylem vessels
Related Questions
The process of mineral ions moving from one part of the plant to another is primarily driven by:
Diffusion and osmosis
Active transport and transpiration pull
Gravity and capillary action
Passive transport and root pressure
Which statement BEST describes the role of casparian strip in mineral ion uptake?
It enhances water uptake by increasing the surface area of the root.
It prevents water loss from the xylem back into the cortex.
It facilitates passive diffusion of all minerals into the stele.
It forces water and minerals to enter the symplast, allowing for selective uptake by endodermal cells.
Which mineral is a constituent of the ring structure of chlorophyll?
Iron
Magnesium
Manganese
Zinc
Direction of translocation of organic food or solutes, is
Upward
Downward
Radial
All of these
Which of the following statements is INCORRECT regarding the translocation of mineral ions in plants?
Mineral ions are transported through the xylem.
Transpiration pull plays a major role in mineral ion translocation.
Mineral ions are transported along with water.
Mineral ions are transported through the phloem.
Researchers observed that inhibiting phloem unloading in a developing fruit resulted in a decrease in sucrose transport to that fruit. However, the transport of certain amino acids to the fruit was unaffected. Which explanation is MOST likely?
Amino acids are transported through the xylem, not the phloem.
Amino acid transport is solely driven by diffusion, unaffected by phloem unloading mechanisms.
Amino acids and sucrose share the same transporters, but amino acids have a higher affinity.
Amino acids are unloaded via a different mechanism than sucrose, potentially utilizing specific transporters independent of sucrose unloading.
The deficiency of which mineral element is most likely to affect protein synthesis in plants?
Nitrogen
Magnesium
Phosphorus
Potassium
Which element is LEAST likely to be remobilized within the plant?
Nitrogen
Phosphorus
Potassium
Calcium
Which condition would MOST significantly inhibit the translocation of sucrose in phloem?
Decreased sucrose concentration in source cells
Increased sucrose concentration in sink cells
Application of a metabolic inhibitor that blocks ATP synthesis in companion cells
Exposure to light
Which of the following is NOT a characteristic of the phloem tissue involved in translocation?
Bidirectional transport
Living cells
Active process
Unidirectional flow in the whole phloem
