Q. Assume that an actively respiring cell has 3x number of $K^{+}$ in its cytoplasm and 2x number of $K^{+}$ entered into the cell. What is the process by which $K^{+}$ transport has taken place?

A) Primary active transport
B) Secondary active transport
C) Diffusion
D) Passive transport
Explanation

Secondary active transport depends upon chemiosmotic energy (membrane potential and /or ion gradient). In the given question, transport is against ion concentration gradient thus, showing secondary active transport.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.