Prepare for NEET Biology Transport in Plants with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to understand xylem, phloem, and movement of water.
A researcher observes that water absorption by roots is significantly reduced when the plant is treated with a respiratory inhibitor. Which of the following best explains this observation?
Respiratory inhibitors directly block aquaporin function, preventing water movement.
Respiration is essential for maintaining root cell turgidity, which is directly linked to water absorption.
Active transport of ions into the root cells requires energy, creating a water potential gradient that drives water uptake.
Inhibition of respiration disrupts the cohesion-tension theory, preventing water movement through the xylem.
Which of the following scenarios would result in the LEAST efficient water absorption by a plant's roots?
Slightly acidic soil with optimal nutrient availability
Well-aerated soil with moderate water content
Low soil temperature coupled with high humidity
High soil salinity coupled with low soil oxygen levels
The movement of oxygen from alveoli to pulmonary capillaries is best described as:
Active transport requiring ATP
Facilitated diffusion via carrier proteins
Simple diffusion driven by a partial pressure gradient
Osmosis across a semipermeable membrane
A researcher applies a potent respiratory inhibitor to the root cells of a plant. Which of the following would be MOST directly affected, ultimately impacting root pressure?
Water potential gradient between the soil and root hairs
Cohesion and adhesion of water molecules in the xylem
Transpiration pull from the leaves
Active transport of ions into the xylem
Which of the following experimental manipulations would MOST effectively demonstrate the contribution of root pressure to xylem sap ascent in a small herbaceous plant?
Submerging the roots in a hypertonic solution and observing changes in leaf turgor
Measuring the rate of transpiration under varying light intensities
Removing the apical bud and observing the effect on guttation
Measuring exudation rate from a cut stem stump after applying a respiratory inhibitor to the roots
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.
Diffusion, a process occur(s) along the concentration gradient is actively involved in
    Transpiration
Respiration
Photosynthesis
All of these
Diffusion, a process occur(s) along the concentration gradient is actively involved in
    Transpiration
Respiration
Photosynthesis
All of these
    A group of students are studying transport of certain type of molecules in a cells and observe that transport slows down when the cells are treated with poison, a chemical, which inhibit energy production. Under normal conditions, the molecules are being studied and it is estimated that molecules probably transported by
    Osmosis
Process of active transport
Process of facilitated diffusion
Process of simple diffusion
