B2.1 - Key Words

Active transport

Movement of molecules against their concentration gradient

Cell cycle

The process of cell growth and division

Concentration gradient

Difference in concentration between two regions

Differentiation

Conversion of cell from unspecialised to specialised

Diffusion

Net movement of particles from a place where there is a high concentration, to one where there is a low concentration

DNA replication

Process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules

Meristems

Growing region of a plant

Mitosis

Process by which body cells divide

Osmosis

Diffusion of water molecules from region of high water potential to low water potential through a selectively permeable membrane

Mitosis

Process by which body cells divide

Osmosis

Diffusion of water molecules from region of high water potential to low water potential through a selectively permeable membrane

Specialised

A cell that is adapted to perform a particular function is called a specialised cell

Stem cell

Undifferentiated cell

Water potential

Concentration of free water molecules