Question

In cell transport, the difference between permeable transport and bulk transport relates to
A. Structure of molecules allowed to pass-through
B. Solvent system, as well as the structure of molecules, are applicable
C. Solvent system is applicable
D. Molecular weight of atoms to pass-through

Answer 1

The active transport is an energy-dependent process whereas passive transport is an energy-independent process. The bulk transport includes the transport of molecules in a high amount.

Complete step by step answer:
-In active transport, the substrate moves through the membrane of the cell against the concentration gradient and uses ATP molecules as energy to move against the concentration gradient.
-In passive transport, the movement of molecules follows a direction – the solute molecules move from a higher concentration gradient to a lower concentration gradient. In this case, the equilibrium is maintained by the movement of the solvent moves from a low solute concentration region to the high solute concentration region.
-During bulk transport, the large molecules cross the plasma membrane in bulk amounts. In this transport mechanism, vessels are formed by the cell that takes in or out a large quantity of materials that are packed in the vesicles, and then the vesicle is transported. Depending on the direction of movement, bulk transport can be exocytosis or endocytosis – when vessels are moving out it is called exocytosis and when the vessels move into the cell, it is called endocytosis.
So, the correct answer is option A-Structure of molecules allowed to pass through.

Note: The other mechanisms of cellular transport include simple diffusion, osmosis etc. All the transport takes place via transporter channels which are hydrophilic from inside and hydrophobic from inside.