Prepare for NEET Biology Mineral Nutrition with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert solutions to understand nutrient uptake and deficiency.
A scientist is studying the role of micronutrients in plant growth. They observe that a particular plant species exhibits stunted growth and interveinal chlorosis in young leaves. Which micronutrient deficiency is MOST likely responsible for these symptoms?
Manganese
Zinc
Copper
Iron
A plant experiencing calcium deficiency shows necrotic spots on its leaves and stunted root growth. This is primarily because calcium:
Is a mobile element easily transported within the plant.
Acts as an enzyme activator in various metabolic pathways.
Is a component of chlorophyll and other photosynthetic pigments.
Is crucial for cell wall integrity and membrane permeability.
Which pair of elements are predominantly found in older leaves due to their immobility within the plant?
Nitrogen and Potassium
Magnesium and Phosphorus
Calcium and Boron
Iron and Manganese
Which micronutrient is essential for the synthesis of auxin, a plant hormone crucial for growth and development?
Copper
Molybdenum
Zinc
Boron
A researcher observes that a plant exhibits stunted growth, delayed flowering, and reduced pollen viability. Further analysis reveals a deficiency in a specific micronutrient that plays a role in pollen germination and cell division. Which micronutrient is MOST likely deficient?
Iron
Manganese
Copper
Boron
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 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
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
Iron deficiency in plants often leads to interveinal chlorosis. Considering the role of iron in electron transport and chlorophyll synthesis, which statement BEST explains this observation?
Iron is a key component of the electron transport chain, and its deficiency disrupts energy production needed for chlorophyll synthesis in the interveinal areas.
Iron is essential for chlorophyll synthesis, and its deficiency leads to reduced chlorophyll production, primarily in the interveinal areas.
Iron deficiency primarily affects the vascular tissue of the leaves, leading to reduced chlorophyll transport to the interveinal areas.
Iron deficiency enhances chlorophyll degradation in the interveinal areas, leading to chlorosis.
