Which process would include a net movement of sugar molecules through a membrane from a region of lower concentration to a region of higher concentration.
3) active transport
4) passive transport
We're basically trying to cram more sugar molecules into a place that's already full of them. Think of it like trying to eat when you're already full, or trying to cram clothes into a packed suitcase.
Let's define these terms and see what fits:
- Osmosis is the motion of a solvent (water) from a region of low solute concentration to high solute concentration. Sugar is usually a solute, not a solvent.
- Cyclosis is the movement of the cytoplasm. This doesn't have to do much with moving sugar through a membrane.
- Active transport is movement through a cell membrane from an area of low concentration, to high concentration. It requires energy to do this.
- Passive transport is movement through a cell membrane from an area of high concentration, to low concentration. It is also called diffusion. Osmosis is one type of passive transport.
So, based on these definitions, C) Active Transport is the only one that fits the terms; it can move against a concentration gradient, cramming more sugar molecules into an already sugar-packed space.
:- Active transport is the movement of all types of molecules across a cell membrane against its concentration gradient (from low to high concentration).