1. Facilitated diffusion is the passive movement of molecules across membranes, down their concentration gradient, which is aided by carrier protein molecules.
- None of the above
- the movement of molecules against it's concentration gradient, using energy in the form of ATP, and transport proteins
- the movement of water molecules from a region of higher water potential, to a region of lower water potential, across a partially permeable membrane
- the movement of molecules down a concentration gradient, from an area of high concentration, to an area of low concentration.
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Other questions in this quiz
2. in Anaphase the centromeres divide, separating each pair of sister chromatids. The spindle contracts, pulling the chromatids to opposite ends of the cell
3. what are vesicles?
- the organelle that is involved in protein synthesis
- membrane-bound sacs found in cells, that are used to carry many different substances around cells.
- types of blood cell
- alternative name for nuclear pores
4. what is a hypotonic solution?
- solution with a higher water potential than the cell
- solution with a lower water potential than the cell
- solution with the same water potential as the cell
5. define differentiation
- the differences between two cells
- the ability to complete any role in any cell of the body
- the development and changes seen in cells as they mature to become specialised cells
- the point on cell, where nuclear division takes place