Q. Which of the following statements are correct about mineral absorption in plants?
A) In the initial phase, ions are taken up into the outer space of cells, the apoplast. It is a passive process
B) In the final phase, ions are taken slowly into the inner space, the symplast of cells and it is an active process
C) Passive movement of the ions into the apoplast occurs through ion channels, transmembrane proteins, which acts as selective pores
D) All of the above
Explanation
Ions uptake takes place in two steps (i) Initial phase Rapid uptake of ions into the ‘outer free space’ of cells, the apoplast. It is called passive uptake (ii) Second phase Ions are driven up into the inner space, by the symplast of the cells
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.